(12 Jan 2014, 2:52 pm)Tom wrote Suppose so!
Well, bar the Deptford ones, these are the SPD's that need replacing:
8220 - Winlaton
8221 - Stanley
8229 - Gateshead
8236 - Chester-le-Street
8237 - Chester-le-Street
8238 - Chester-le-Street (Can't 4944 just be it's replacement?)
8239 - Percy Main
8241 - Percy Main
probably keep 4926-31 at Chester as replacements for 8236, 8237, 8238 and 8289, allowing 4944 to replace 8229 at Gateshead. Wonder if 4911 will replace 8220 at Winlaton.