1911 FIRST OFFICIAL U.K. AERIAL POST/LONDON EMERGENCY ENVELOPE IN RED-BROWN TO EASTBOURNE. A fine example of the London emergency envelope in red-brown to 'Miss Ursula Pacy Lidford Lodge Ratton Road Eastbourne' with fine KGV 1d Downey cancelled fine to very fine strike FIRST UNITED KINGDOM/AERIAL POST LONDON date stamp SP 15 1911 die 3. With original notelet within '...the occasion is so special. I thought you ought to have both letter and card for your collection to be complete. They will be posted at the Stores, sent by motor to Hendon and so on...'. (Ref 121495).