Hello 48111 hope you're well? I checked back in my spotting books, and the class 310 units were listed in the 1998 edition but with a lot of gaps where units had been withdrawn, and by the 2002 edition they had all gone, replaced by the class 321's I believe. I don't think that anyone has preserved one, not surprising really as none of the preserved lines have the 25Kv overhead.
Regards, 62440.
