(20 Aug 2015, 6:16 pm)brianr wrote 1799 might be a candidate, it seems to flit in and out of the reserve fleet at Darlington. I remember this being allocated to Blyth a few years back. 04 reg so good enough for a year or two.That wouldn't surprise me, think it's totally possible that 2503 could maybe transfer back to Darlington replacing 1799 as service U1 will be withdrawn next month which will see Belmont's PVR drop by one and service U1 has been a Solo everytime I've seen it in the last few months.
Speaking of 2503, I saw it on the 49A in Durham yesterday and the front LED screen was only showing the via points where it would normally show its terminus destination and also displayed no service number.