The Mystery Force "H"

[Bravo]

I have been away from SH5 for a year (been on Train Simulator). I now find it's a so called "Gold" edition. What are the improvements (if any) over the old version I had ?
I have quickly re-learnt my old skills and have progressed fairly easily to Mare Nostrum. The flow chart thing also gave me the option of doing "Western Approaches" but I thought I'd already done that? So don't know what that was about, anyway, the 1st time I tried it, I went right to where the round red circle thing is called "Force H" but couldn't find anything. So next time (started Mare Nostrum at March 17th 1941 again) I went to the 1st of the little yellow pins that says patrol this area, but nothing there. Then got sent to second yellow pin, so far nothing these either. Where is this Force H? And how CLOSE to those pin things do you have to be to get anywhere please ?