Details on all the faceplate revisions here https://uktechhub.com/forums/topic/bt-master-sockets-and-face-plates-wiki/At the moment I’m thinking of trying to source a filtered faceplate for the NTE5A (which are probably few and far between these days) or getting it all swapped out for a NTE5C
Basicly just need this https://www.run-it-direct.co.uk/adsl-vdsl-faceplates/mk4btopenreachvdslsocket/ which can also be had much cheaper on ebay.
These newer filtered faceplates apparently also have a REIN filter which the ADSL filter dongle things probably don't have. The filtered faceplates are cheap so I'd be inclined to use one instead of a dongle but it would work well enough.