A B767 Captain reported that the First Officer overshot assigned altitude on takeoff from EGLL. He was overwhelmed alleging no relevant re-training prior to this trip was provided.

Narrative

Received our clearance for runway heading to 2.0 then I believe a right turn to a heading of 220 and climb to 6000 FT. As we approached 6000 FT; the First Officer flying inadvertently over shot the altitude by 300 FT. Departure had us verify our altimeter setting and asked us and asked us to verify our altitude. I said we were returning to 6000 FT. No traffic conflict occurred nor was any traffic observed on TCAS. This was my first trip to EGLL in years. I had received ZERO training for this trip other than being sent to a four hour thirty minute recurrent training course which covered virtually nothing for the North Atlantic Track flying or European flying. I have been flying domestic for over a year; and prior to that; flying the Caribbean and Latin America north for several years. Needless to say I felt a bit overwhelmed by it. Now we get to add one more item to the equation. The 767 we were flying had an instrument upgrade! This was the first time I had seen this configuration on the line. The only introduction I had had to it was during a SIM check maybe two years ago! I realized that none of this is an excuse and I take full responsibility for failure to monitor the First Officer properly. It will not happen again (I hope).