Its hot in London!!

Im sitting outside terminal 3 at Heathrow - its too hot and stuffy inside. Who would have thought Id be doing that in London at the end of November. My bag is all checked in and I just hav to go thru security. Ive got 3 hrs til I fly but wil go thru soon so Im not rushed. Sadly there was no upgrade to first class or even premium economy but thanx to Judi at QANTAS check in I got 1.2kg extra in my checked bag & I think almost 3 in carry on - for no extra cost. Lucky I sent that 10kg package of stuff home. Flight time 12hrs 55min :( Im planning on sleeping for most of the way - Im very tired!