A mate of mine (not me, honest, I did my QXC in the NW) was on his QXC, flying Luton to Ipswich in the '70s. Saw "Ipswich" from afar, gave them a call, they told him they were closing the radio for lunch. He proceeded around the circuit, made all the necessary calls and did a greaser.
Whilst he was slowing up on the runway however, he saw a man and his dog walking towards him. He thought he ought to tell them not to walk on the active so he opened the window of the C150. Aforesaid man shouts "What are you doin' 'ere mate?" My mate says "landing of course.... this IS Ipswich isn't it?"
"Nah, mate, this is Martlesham 'eath. It's been closed for years. Ipswich is over THAT way... (waves stick in general direction)"
"OK thanks for that" replies our hero, hurredly backtracks, takes off and eventually finds Ipswich.
They were still at lunch when he arrived. He had to wait until he could find someone to sign his form, but no-one was the wiser.