Bees

There are multiple big bees going in and out from the gap in my attic and the buzzing is so loud it feels like they are in my main housing area

Probably Tree Bumblebees (Bombus hypnorum).
They were first sighted in the UK in 2001 now they are everywhere.
Unlike UK native bumblebees they can be bad tempered and aggressive, they don’t tend to like lawn mowers, pressure washers and sometimes just wake up wrong and sting you for fun.
Many will tell you to leave them be – but that depends on where they are and what activities you carry out within their territory (which can be large).
If you were local, we would offer to remove them.
They can be anything up to 5 or 6 metres away from the entry point into your property.
Best bet is to look them up on the web and read about them; if you decide you want to do something about them get in contact with a full member of the BPCA – https://bpca.org.uk/find