duffers2324
Member
I remember they did that during the Overground days with the new solos at the time they branded the 89/90 service as the grey line and frequency was every 20 minutes for it, as far as im aware the reason they stopped doing the inner and outer circles was due to the fact of 1) reliability and 2) they wanted to have 2 physical termini so it was seen as a point to point route and therefore as i have said it would help reliability rather than a circular, saying that it is back in a small way as i have seen that first now do the 89/90 circle journeys again albeit in the evening and for SPT meaning subsidised