CB
Where you are I would expect you to see the Gatwick inbounds via Bexil which were working 128.42, transferred to 120.17 (or 120.52 when bandboxed) nearing FL150.
Other traffic will be appraoching from the South-west working 135.32 and then 128.42, normally descending FL100 inbound to Biggin Hill or London City.
Just a couple of other thoughts on your UK inbounds, as GWC seems a bit far away for you to see!!!