Oxford News
What are wet bulb temperatures? UK prepares for hottest June
Wet bulb temperatures offer valuable insights into atmospheric moisture and human comfort levels.
It plays a vital role in climate monitoring and helps explain the impact of humidity on daily life.
One of the most traditional and widely used measures of humidity is the wet bulb temperature.
The Met Office say: “This value provides insight into how saturated the air is and is essential for calculating other humidity-related variables such as relative humidity and dew point temperature.”
What is a wet bulb temperature?
Measured using a thermometer wrapped in a damp muslin wick, wet bulb temperature represents the lowest temperature achievable through evaporative cooling.
⚠️⚠️ Amber weather warning UPDATED ⚠️⚠️
Extreme heat across parts of England and Wales
Monday 22 and Tuesday 23 June
Latest info 👉 https://t.co/QwDLMfRBfs
Stay #WeatherAware ⚠️ pic.twitter.com/qjNu88R6uB
— Met Office (@metoffice) June 20, 2026
The reading drops as water evaporates from the wick, drawing heat from the thermometer. This cooling continues until the air becomes saturated and can absorb no more moisture.
On foggy mornings or in fully saturated air, wet bulb temperature matches the dry bulb temperature—the actual air temperature.
In all other conditions, the wet bulb reading is lower.
The underlying principle is simple: evaporation requires energy.
Water vapour draws heat from the surrounding air and thermometer, leading to a cooler reading.
The larger the gap between dry bulb and wet bulb temperatures, the drier the air.
When there is no difference, the air is fully saturated and evaporation stops.
Traditionally, wet bulb temperature is measured using a psychrometer—an instrument with paired dry and wet bulb thermometers.
However, most modern weather stations no longer use this classic setup.
“Instead, they rely on two separate thermometers housed in a Stevenson screen: one dry bulb (measuring air temperature) and one wet bulb (wrapped in a moist wick connected to a water reservoir).”
Air moves over both thermometers, allowing evaporation from the wet bulb and resulting in evaporative cooling.
The dry bulb remains unchanged.
The temperature difference helps meteorologists calculate relative humidity and other important humidity metrics.
Modern technology has introduced capacitive sensors to the process.
These sensors measure humidity by detecting voltage changes caused by varying amounts of water vapour in the air.
Readings are then converted into relative humidity or dew point values, providing an automated and more precise method of measurement.
Wet bulb temperature is closely tied to other indicators, such as dew point temperature—the point at which air becomes saturated and moisture begins to condense.
On cool mornings, this is seen as dew forming on grass.
If the dew point or wet bulb temperature equals the air temperature, relative humidity is 100 per cent.
Both values are critical for understanding atmospheric moisture.
They enable meteorologists to assess the likelihood of rain, fog, or heat stress for people and animals.
The Met Office added: “Wet bulb temperature remains a fundamental tool in meteorology for assessing humidity and its effects on weather, climate, and human health.
“Whether measured using traditional psychrometers or advanced sensors, it provides valuable insights into atmospheric conditions.
“By understanding and monitoring wet bulb temperatures, the Met Office continues to deliver accurate forecasts and support public safety across a wide range of sectors.”
Are you looking forward to the heatwave or dreading it? Let us know in the comments
Oxford News
Milestone reached to keep Andrew Harper’s killers in jail
The Change.org surpassed the 500,000 milestone just before Thursday afternoon, August 6 and continues to rise at speed.
Hundreds of thousands of people across the UK are demanding the government do not let Albert Bowers and Jessie Cole out of jail early.
Some 5,000 people are expected to be released early under sentencing changes, down from 6,000 after ministers exempted rapists and “serious” child sex offenders as part of the scheme to tackle overcrowding in jails.
READ MORE: Frustrated residents demand better bus service
Cole and Bowers remain eligible to be freed halfway through their 13-year sentences after they were convicted of manslaughter in 2020 following Pc Harper’s death in 2019
As she backed the calls, widow Lissie Harper said: “Government has punched us in the gut… they should be ashamed of themselves.
“Hopefully we can make the current Government come to their senses and realise we cannot put people like this back on our streets. Justice should mean justice and serving the sentence given.”
Aileen O’Connor, who chairs the Thames Valley Police Federation, said releasing Cole and Bowers would anger and demoralise serving officers in the area.
Tory leader Kemi Badenoch said she supported the Police Federation in considering a judicial review.
She told Today: “I’m not arguing against early release. We’ve had early release even under Conservatives.
“I’m against early release of this dangerous category of rapists, paedophiles, killers, including the killers of Pc Andrew Harper.”
Oxford News
Manhunt for Arsenal fan amid London credit card fraud probe
Thames Valley Police has released a CCTV image of a man they are searching for in relation to money reportedly being fraudulently withdrawn in Oxfordshire, Ascot and London.
The force said that on May 20, the suspected offender obtained the bank card and PIN number of the victim, a woman in her 20s, which were being posted to her address.
READ MORE: Launch date for new Oxford ‘traffic filter’ scheme announced
They then proceeded to withdraw thousands of pounds from the victim’s account over the next 12 days, before the woman became aware and blocked the card.
The money was withdrawn from cash machines at several locations, including NatWest, TSB and Nationwide branches in Witney, HSBC in Chiswick, Nationwide in Oxford, and cash machines at Tesco and Sainsbury’s in Ascot.
Police are searching for this man in relation to a credit card fraud probe (Image: TVP)
This was between 20 May and 1 June 2026.
Investigating officer, Detective Constable David Mathieson, said: “I am appealing to anyone who witnessed any suspicious activity at the cash machines between the dates we are investigating, or has information that may assist us to please get in touch.
READ MORE: Drug and car seized from ‘illegal’ Kia motorist in Oxfordshire town
“If you recognise the man in the image, or if this is you, please contact us.
“Anyone with information should call 101 or make an online report, via our website, quoting crime reference number 43260273378.
“If you don’t want to speak directly with police, you can also call the independent charity Crimestoppers 100 per cent anonymously on 0800 555 111.”
“If you suspect your card or account has been compromised, contact your bank immediately.”
Oxford News
Ludwig BBC detective drama second series date announced
Comedian David Mitchell stars as John “Ludwig” Taylor, a reclusive puzzle designer who assumes the identity of his twin brother – a detective chief inspector – after he goes missing.
The hit series also features Motherland’s Anna Maxwell Martin, with Fleabag star Sian Clifford and Scottish actor Mark Bonnar joining the cast as regulars in the second series which is due to be broadcast in August, with a third series already commissioned.
READ MORE: Ludwig creator reveals secret of series success
The detective drama set in Cambridge is one of the BBC’s most successful in terms of viewing figures for many years.
Mr Mitchell has strong Oxfordshire connections – he grew up in Oxford where he enjoyed watching Inspector Morse on ITV, and was a pupil at Abingdon School.
David Mitchell in Ludwig (Image: BBC/Big Talk Studios/Olly Courtney)
The BBC has confirmed that Ludwig will return for its second series later this month, with all six episodes to be released as a box set on iPlayer from the same date.
The newly confirmed release date is Thursday, August 20 at 9pm on BBC One, confirming what the BBC had previously teased only as an August 2026 return.
Perhaps an added bonus for fans is that, rather than waiting week by week, they will be able to binge the entire box set on iPlayer as soon as the opening episode airs.
David Mitchell returns in his role as John ‘Ludwig’ Taylor, now working officially as a Crime Scene Consultant for the Cambridge Police Authority, teaming up with DCI Russell Carter on seemingly “impossible” crimes.
No longer masquerading as James, he is “more Ludwig than ever”, brilliant at puzzles but hopeless at almost everything else – the fate of his brother, though, still eludes him.
Returning alongside Mitchell are Anna Maxwell Martin as Lucy Betts-Taylor, Dipo Ola as DI Russell Carter, Dorothy Atkinson as DCS Carol Shaw, Ralph Ineson as Chief Constable Ziegler, Karl Pilkington as DI Matt Neville and Dylan Hughes as Henry Betts-Taylor.
The new series also introduces new faces, including Mark Bonnar (Guilt, Line of Duty) as newspaper editor Gareth Fisher and Sian Clifford (Fleabag) as local MP Joanne Kemper.
Ben Ashenden and Rumi Sutton co-star as DC Ethan Cole and DC Caitlin Sullivan respectively.
The BBC will be hoping to repeat the runaway success of the first series.
Ludwig launched in 2024 to strong reviews and sizeable audiences, drawing more than 9.5 million viewers and ranking among the BBC’s biggest scripted hits of the year, according to the Radio Times.
It also earned a 97 per cent score on reviews site Rotten Tomatoes, cementing its reputation as a quirky detective drama with puzzles at the heart of the plot.
Mark Brotherhood is the series creator.
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