If we are talking realism: I don't think it is very realistic to expect a chap in a wooden hut to "talk you in". He doesn't have a clue where you are he doesn't have radar! So how can he give you a vector to the base?
The real WW2 pilot would navigate using a folder up map on his lap and use his eyes to spot landmarks. Very difficult to do in practice but quite good fun in the game. The Bob 2 map could do with a lot more map-detail I.e. place names and visible objects such as churches etc.
I agree with that, radar(RDF) was only available at sector ops units and often not capable of spotting a single aircraft. Radios were also damaged in combat leaving no option but mkI eyeball.
Those of us who are are English already have an idea of the major landmarks so all we have to do is figure out the relationship of the various airfields.
I trained myself the same way BoB pilots would have done, by flying cross country to familiarize. Taking off and landing at different fields improved navigation and general flying skills. I fly at 240mph( 4 miles a minute) so that I know when I'm due to arrive.
Biggin, Kenley and Croydon are close so easy to find, Tangmere has Chichester harbour and cathedral.
Northolt was the only one I found a bit tricky but by flying along the Thames and turning north at Staines reservoirs it pops into view after a minute.
"Only birds and fools fly and even the birds don't fly at night"