carson356 - spot on!

There are 2 fuse holders just in front of the battery that I've never noticed before - both hidden under black plastic covers:

The larger one contains 2 regular type fuses - both mine are the white type (8a?) and un-broken. Read somewhere that these are for the soft top control unit and roll over bar.

The smaller holder contains a fuse in the form of a thick metal strip screwed in place (30a?). Visually it looked fine, but once I pressed it with my finger I realised it was neatly split in two. This I understand to be for the actual hydraulic unit.

Presume both the soft-top and roll bar are driven from the same hydraulic unit. Will get a new fuse and see if that solves things.

Cheers,
Neil