Purple Train
Established Member
There are a couple of morning peak Elizabeth Line services on weekdays from Reading that skip the usual calls at Taplow, Langley, Hayes and Harlington, and Southall, but call at Acton Main Line which is normally only served by Heathrow trains. I believe this is simply because Acton Main Line couldn't cope with just 4tph in the mornings. Interestingly in the evening peak, the fast Reading services don't call at Acton, and are, as usual, non-stop from Paddington to Ealing Broadway.