Saturdays 22nd and 29th October, 5th, 12th and 19th November
EC Anglo-Scots services starting with 1230 KGX - ABD and 0725 ABD - KGX all run PBO - DON and return via Sleaford, Lincoln and Gainsborough. All use HSTs.
EC Leeds services starting with 1303 KGX - LDS and 1305 LDS - KGX are all MK4. They run normal route KGX - PBO, then are dragged by a 67 to NNG via Sleaford, reverse at NNG and forward under their own power via ECML to Leeds.
Sundays 23rd and 30th October, 6th 13th and 20th November
0900 KGX - EDB and 0903 KGX - LDS are both HST and are PBO - DON via Sleaford, Lincoln and Gainsborough.
0805 and 0905 LDS - KGX are MK4 and normal route to NNG, dragged by a 67 to PBO via Sleaford and forward normal route.
0755 and 0848 NCL - KGX are HST and are DON - PBO via Gainsborough, Lincoln and Sleaford.
Hope this helps.