During the pandemic the chatter has been a little quieter than normal, but if anyone is close enough and is interested the frequencies to listen in on are.
Thames Radar 132.700Mhz
Thames Director 133.450Mhz
Heathrow Radar 125.625Mhz
Thames Director 128.025Mhz
London city tower 25 miles 118.075Mhz / 129.450Mhz
London City Tower 2 miles 121.825Mhz
ATIS information 136.350Mhz
Fire 121.600Mhz
All broadcasts are in AM and should be receivable on a commercially available scanner.