without wishing to divert the thread into a grim 1920's episode of Top Gear, I'd say it was entirely feasible to drive to London from Birmingham in 2/3 hours in the mid 20's....a Bugatti sport doing 60mph down Watling St / the A5 wouldn't have much bother covering the 100 (ish) miles ....
anyway, its not the automobile issues that I find distracting, it's still the Bromsgrove meets Scottie Rd accents.....particularly Polly, who morphs into Cilla Black whenever she gets angry...which is quite often
still not convinced by the cars. i don't think the A5 would be in a good enough condition to go flat out all the way (which 60 would be, pretty much) - it still isn't
. but it's a minor point, just something that always strikes me as odd. and it's not so much the timing (they never actually mention how long it takes), more the ease of it. regardless of speed, travel by car would have been more of an arduous experience back then, travelling at speed on roads designed for carts, yet tommy arrives looking like he's just stepped off a first class pendolino into euston
.
i agree about polly's geographically ambiguous accent. the others have improved in season 2 though.
all in all, a really great show, that should get more episodes to do it justice.