Do any UK hotels near Heathrow have queen or larger beds?

There are practically no hotels in europe with king size beds. And many that are called "queen" are not the US size queen.

Your best bet is to check the websites of hotels near the airport and then either search the websites or email them to find out if the "queens" really are.

Separately, assume that yuo are doing this just to make an early flight - not to try to tour London.

Try the Sofital.

I just checked the website and the Heathrow Marriott has king size... You might check with them or with some of the other chain hotels there, such as Radisson.

Just so you understand - a 'King" in the UK is what Americans call a queen.

See my post on your other thread. What time do you land and what time must you be to St Pancras? Unless you land very late at night, it probably makes more sense to stay in London rather than out at LHR.