Westie in other words it is not classed as CAT A, exposed live parts, where they have to respond within 3hrs, I think the lead time for CATB is 2 weeks, CAT C , is when they can get there, eg broken tag on the cut out or fuse carrier.
The service levels on cat b are 8 weeks I believe, but the fused neutrals must be done within 28 working days as required by the hse.