I have a yupiteru hand held scanner which does give good reception,a maycom 108 which we also take to LGW to use when by the end of the runway,it still gives quite good reception here 30 miles away, but the best scanner I have is a Signal corpn one-it is home based, has a dipole aerial attached to it on our chimney-we are very high up and it picks up loads of freqs and it can get the LHR approach sometimes both sides of the transmissions,and the LGW tower--if you see one on ebay that is in good nick buy one-it is an elderly scanner but fab-saw one go recently for 275.00!
Good Luck