After losing his job at a timber yard Clifford joined the RAF just before the conscription age of eighteen. When he had completed his training, he was posted to Gatow in Germany, the main British airfield, at the start of the Airlift in June 1948. He was a clerical worker, ensuring the safe and rapid turnaround of hundreds of flights, as well as performing guard duty and manual work.
During the Airlift disassembled vehicles and food were delivered and on the return journey they brought back sick children and post, which was forwarded. There were large numbers of Germans working on the base, alongside the RAF personnel and during the Airlift the western Allies began to be seen as defenders, rather than occupiers.
He remembers the appreciation of German children and parents when he and his comrades gave the children a Christmas party on the base. The British troops paid for this and gave gifts of chocolate bars and oranges to the youngsters. In Berlin he acquired an appreciation of opera, made good friends and had a German girlfriend. Marrying German women however was frowned on by the British authorities. One episode he recalls vividly is getting very drunk on his 21st birthday and being disciplined by his superior officer.
Clifford felt that he matured from a boy to a man during his time in Berlin and was sad to leave. Some of his companions thought that the Germans deserved all they got but that was not his opinion.