Absolutely.

I think it is such a pity that flight deck visits are banned on UK airlines.

When I was a PPL student in '99 I was flying back from Sao Paolo to Gatwick aboard a BA 744. Once I estimated that we had reached TOC I quietly asked one of the CC whether it would be possible to see the flight deck. A few minutes later she returned and ushered me upstairs and into the cockpit!

There I spent most of the remainder of the flight being taught how to use the FMC, TCAS and weather radar. It was a beautiful evening at FL370 over the South Atlantic and it felt quite surreal watching the aircraft progress on the nav display with a fellow BA 74 ahead on the way to Heathrow appearing on TCAS - we could also see his nav lights in the distance through the darkness. A wonderful experience.

i was allowed to visit the flight deck and talk with the pilots for at least 2 hours while in cruise. but then again i do have work for that airline (non flying) and have an airline id, plus im half way into my pilot training.
was an amazing experience.