7000 on the transponder with mode C, there was in fact 2 other aircraft that crossed our nose right to left and I did ask the controller on the phone if he had seen them and the response was silence.
no changes to airpspace or maps and my GPS and the CAA map agree with each other.
on the phone the controller said he was busy with a runway change. High workload I can sympathise with but to accuse us of something we clearly did not do is inexcusable.
I am the first to stick my hand up when I do do wrong and about 800hrs or so ago I did impinge birminghams airpspace by 100ft on a night flight. I called and apologised and made sure I never repeated the mistake.