My understanding is that the Falklands aircraft have the LIPS deicing spec whereas the UK SAR aircraft were always intended to have the FIPS deicing spec.
I seem to remember that a Rotorheads contributor has already made a few statements about the power requirements and the difference between the two fits.
The chances of having FIPS ready for the UK contract start was always known to be slim. Dragging a bit now though.
SLB, the delays were never about ice protection. The potential for these systems to get fully developed and certified in winter 2014/15 was always slim and entering service with LIPS or with no ice protection may have been a fallback option for one or more bidders.