I should say that you should use the BS1361 HRC fuse in preference even
if both types fit. I don't know if BS1362 (standard plug fuses) have
sufficient breaking capacity.

The rated breaking capacities are 16.5 kA for BS 1361 consumer unit fuses
and 6 kA for BS 1362 plug fuses.

6kA is normally enough. Most MCBs are 6kA anyway, with some 10kA. A quick
check with a loop tester should indicate compatibility, if you happen to
have one lying about...

Christian.