The MET of the UK has ordered the heat wave warning to be raised by 1 deg centigrade. They say the climate warming or climate change is official. But, to be honest, I am going to actually call the MET office and ask for proof of these claims. Perhaps I might get a solid answer.
Keep in mind that these changes are different all over the country…so you would have to ask your local weather service what the new high temp threshold warning is for your “county” in the UK.
Here is the link: