Officers hold a silence for PC Andrew Harper as his parents pay tribute to their "superhero" son.
Thames Valley Police appeal for information concerning the death of PC Andrew Harper.
Prime Minister Boris Johnson has described the killing of PC Andrew Harper as "mindless and brutal".
Police say reports of a rotting chicken and a dog with missing fur are examples of the 999 system being misused.
A police force has decided to cancel its open day to the public due to adverse weather forecast.
Thames Valley Police said it would "not be safe or practical" to hold the event due to strong winds posing a risk to a "significant amount" of temporary structures.
Chief Constable John Campbell said: "We apologise for any inconvenience caused to all those who were looking forward to the open day as much as we were."
The Met Office has issued a yellow weather warning for wind throughout Saturday.
The event was due to take place on Saturday between 10:00 and 16:00 BST at the force's training centre in Sulhamstead, Berkshire.
There have been 91,100 government-funded trees planted in Aylesbury Vale between 2010 and 2018, Forestry Commission data shows.
This works out at 465 trees per 1,000 people.
Between 2010 and 2018 the government funded about 15 million trees in England. Figures for trees planted with private funds or by local councils are not included and the data only covers new trees, not replacements for any that were cut down.
Overall tree planting rates across the UK would need to more than double to combat rising temperatures and climate change, according to official figures.
Last year 13,400 hectares of new trees were planted across the UK, most of them in Scotland, but the Committee on Climate Change says this should rise to at least 30,000 hectares a year.
Campaign group The Woodland Trust said more trees were needed to provide summer shade, reduce air pollution, improve water quality and manage flooding.
The government said it had made it "much easier" to apply for planting grants.
This story has been generated using Forestry Commission data, BBC analysis and some automation.
Officers were forced to shut the motorway as they pursued the geese that were recorded flying at 26mph.
Drones are starting to be used to fight crime across Berkshire, Buckinghamshire, Oxfordshire and Hampshire from next month.
Thirty-five officers have been trained as part of a joint trial involving the Thames Valley and Hampshire forces.
The drones will be used to search for missing people or offenders on the run as well as policing large events or dealing with the aftermath of road accidents.
High quality footage from the drones can be beamed into control rooms or incident command units in real time.
The use of drones in policing is already wide spread across Dorset, Wiltshire, Sussex and Surrey, and has already helped secure convictions.
Certainly in rural areas where we're trying to cover large areas of land, the use of drones rather than using large numbers of police officers is one of the significant benefits we think we'll get out of it
Those on the early shift at BBC Three Counties Radio in Dunstable were surprised to find that someone - hopefully a colleague - had left a white blouse in the office fridge overnight.
Marveling at the workmate's forward-planning skills in advance of what could be the UK's hottest day ever (imagine arriving after a hot commute and slipping in to something cool), it prompted a breakfast phone-in on novel ways to beat the heat.
However, it turned out that said colleague left it there "by mistake" - as you do - while collecting her sandwiches from the fridge before leaving on Wednesday.
However, posing in the white shirt in sweltering midday temperatures, journalist Jane Killick declared her lapse the "best mistake ever" and is going to put it back in there tonight!
Thames Valley Police's crime recording has been rated inadequate by the government watchdog, with concerns raised over the recording of domestic abuse and rape.
Her Majesty's Inspectorate of Constabulary and Fire and Rescue Services (HMICFRS) said although the force has "improved its crime recording" it "needs to do more".
HMICFRS said the force records 87.9% of crimes reported to is, about an increase of 13,800 crimes more than in 2017.
But the inspectorate said despite an increase in recording the numbers "for violent crime are still too low".
It added: "Officers and staff are still failing to correctly identify and record domestic abuse and rape crimes."
A force spokesperson said: "Last year we responded to over half a million calls for assistance.
"That is over 1,400 incidents a day and every day the members of this force come to work to fulfil only one purpose, and that is to keep the communities of Thames Valley safe from harm."
With temperatures predicted to soar to an unprecedented high of 39C (102F) today, many train companies in the eastern region are urging people not to travel unless absolutely necessary.
Network Rail has announced that speed restrictions will be in place for most of the day because of fears that rail tracks could buckle.
Thameslink, Great Northern and Southern have said there will be delays and cancellations to services across the whole network.
East Midlands trains are not calling at Bedford and Southern trains to Milton Keynes are not running.
Greater Anglia has advised people against travelling unless its urgent.
John Halsall, from Network Rail, said: "I've been working on the railway for 10 years - I've never encountered temperatures like this or put in the level of blanket speeds that we're talking about.
"We're not making this decision easily but it is essential in terms of passenger safety."
Recorded crime in the Thames Valley rose by 9.7% in the financial year that ended in March - 2% more than in England and Wales overall - according to the Office for National Statistics.
Det Chf Con Jason Hogg said: "We continue to see rises in some crime categories as victims are having more confidence to report previously hidden crime such as domestic abuse, sexual crime as well as stalking and harassment.
"The reasons for crime recording fluctuations are quite complex and are not necessarily just as a result of an actual increase in crime.
"The increase in overall crime numbers in the Thames Valley is linked to changes in our crime recording processes with our officers and staff now recording crimes at point of contact."
A "perfect storm" of austerity and cuts to police resources is behind rising levels of post-traumatic stress disorder (PTSD) and stress among police officers, a force federation has said.
More than 10,500 officers across the UK had to take time off with stress, depression, anxiety or PTSD symptoms in the past year, a rise of 69% since 2012/13.
400 Thames Valley Police (TVP) officers took time off work for stress, depression, anxiety or post-traumatic stress disorder in the past year.
TVP federation chairman Craig O’Leary said: "If you keep exposing police officers to that much pressure, coupled with the traumatic things they deal with on a day-to-day basis in their jobs, it doesn’t take a scientist to work out that we’re going to suffer disproportionately to most other occupations in terms of PTSD, workplace stress, depression and anxiety.
"“[These figures] show it’s not a good story. Now we need to make sure that we are there, that people step up to the plate, organisations support officers that are going through these tough times," he added.
A police force has said it was "relatively uncommon" for officers to encounter suspects who concealed drugs on them in custody after a man died when he swallowed heroin.
An inquest found a "failure" by Thames Valley Police officers to carry out "constant observations" on Leroy Junior Medford was the "main contributory factor" to the 43-year-old's death.
The force admitted two officers "became distracted", allowing Mr Medford to swallow the drugs he had hidden in between his buttocks.
The father-of-eight died 15 hours later from a heroin overdose, the inquest found.
Deputy Chief Constable Jason Hogg told the BBC the force would "seek to make organisational change and learn" from the death.