Ordinary FM radio to listen to air communication.

Hi all!
As a non-native english speaker learning to fly in UK, I found that the
most challenging part of flying lessons is talking with controllers and
understanding what other pilot say. To get some practice I got ordinary,
20-bucks FM radio changed so I could receive frequency up to 135 MHz.
London Heathrow approach is (probably) 130.25, but despite living
nearby, I can't receive it. Is the radio too weak or I'm missing
something? Some guy said air communication is digital, but somehow I
don't believe it. Or maybe you guys have some other hints for me?
Thanks,

Lukasz