London was attacked, unopposed, by nine aircraft whose bombs destroyed many private houses, offices and warehouses. At the same time, another small force of bombers bombed Margate and were intercepted by Second Lieutenant J E R Young and Air Mechanic C C Taylor of No 37 Squadron in Sopwith Strutter A8271. The Strutter was brought down and both crewmen killed.
Second Lieutenant Wilfred Salmon of No 63 Training Squadron went up in Sopwith Pup A6230 from Dartford but was also shot down and killed.
Captain John Palethorpe went up in a DH4 (said to be A7436) with Air Mechanic F James but was forced to retire when hit in the hip.
The Sky Their Battlefield suggests that Young and Taylor may have been the victims of Gaede and Radke while Salmon may have been brought down by Klimke and Leon.
However, the Strutter fell into the sea near the Mappin Lightship so is not a good match for a claim "near London" and I agree with Mike that this was probably a case of "friendly fire" (if such a beast exists).
Joyce Green is only about 15 miles from the east end of London and Salmon probably intercepted the bombers on their return from the capital. If Gaede and Radke claimed a single-seater, Salmon was probably their victim.
The 28 January 1918 claim by Klimke is obviously a reference to Bristol Fighter C4638. 2nd Lt J G Goodyear and 1/AM W T Merchant had a combat between North Weald and Passingford Bridge, Merchant being wounded in the arm. This was presumably Staaken Giant R.IV 12/15 which continued its trip to London where its bombs fell on a printing works, killing 38 people and injuring another 90.
The only Handley Page loss I can find is C6948 of No 214 Sqn which force landed on the beach near Valkenisse on 30 June 1918, the crew of 3 being interned.
Graeme