The mcbs are 3871 however the type is not so obvious. Each device will need removing to establish this and they will either say;
3871 type C (yes type C).
3871 type 2
3871 with no stated type in which case it is type C as all type 2 devices stated so.
Latter replacement devices still be produced after the Crabtree C50 boards ceased production will be EN60898 type C although these are rare, only seen a couple.
Some say if the writing on the toggle is white then 3871 type C which is generally the case however the yellow written toggles can be type C or 2.
Where it states Part 1 on the side of the device this does not denote its type it is just Part 1 of BS3871.
The same applies to the rccb it is either BS4293 type C or 2.
