Jonathan Morris wrote:

Once people are used to the new name, I hope First will copy FCC to the
signs at Kings Cross (instead of First Cap Connect, which is still too
long for anything but 'on time' messages).

Yes but "King's Cross FCC" sounds naff. And as for "City FCC" it sounds more
like a football club than anything else!

TfL should be saying 'National Rail' services on all stations with an
interchange. It would certainly make more sense to irregular
travellers/tourists who don't really want or need to know station X is
for Virgin, Y for GNER and Z for First Great Western etc. Anyone who
does care will know anyway.

I disagree - a lot of people find the "National Rail services" meaningless.
And TfL don't just say "other tube lines" for their own services do they?