Idgy trespassing next door

It was very hot again in London but I managed to avoid the rush hour trains and went to work a bit later in Earlsfield. It gave me chance to get tidied up for mum arriving tomorrow ready for our trip to Portugal.
The cats are a bit restless looking for somewhere cool, and Idgy headed next door. They have 2 older cats who don’t seem to mind our two coming and going, but it’s a different story if they come into our house and usually results in a lot of hissing.
I don’t think I’ve ever known London to be so hot and sleeping is very uncomfortable.