I Have enquired to Met Office who will reply soon.
They may be staying with the present figures due to climate warming.
Thanks for that Arty.
People often laugh at your typos not just on these threads, but also on the daily CC and monthly precipitation threads even though they are usually very few and far between.
The reason why I have mentioned that is because I realised after posting here that I had made a typo here myself, as I had written 1961-2020 as the old averages when I meant to say 1961-1991.
Luckily, I was able to fix that in my own post but if someone then quotes what I have posted into their reply, I then can't fix that as the only person who can do that is the person who actually made that reply.