This is a very busy and very particular and demanding piece of airspace. Seems a very strange place to pilot this.
Btw what happens if NATS and LCY part company. LCY can't outsource a control tower they don't have. Is this NATS power playing to keep the money rolling in? GIP owned EDI and LGW have both left NATS and given ATC out to third parties recently. Same owner as LCY.