Easiest solution is to remove both the wipers and spray nozzles. Then tape over the holes. Cleaning mechanism is then not fitted and can't be failed for not working. Can't be failed for not having the cleaning mechanism as the manual says 'may be fitted'. 56 TDV8 Vogue SE
9 Freelanders, 2x 2002 TD4ES, 2001 TD4, 2002 1.8GS, 2000 XEDI, 2x 2000 1.8ES, 2004 1.8 & 2000 1.8 GS (rolled)
91 Lotus Carlton (sold)
90 Lotus Elan (BRG)

Passed MOT first time....no advisories either - well chuffed.

(rather than go to an MOT station myself i asked my friendly mechanic to put it through and get it resolved through one of his close contacts - but at the same time not ignore any important safety issues. I was fully prepared and expecting for the whole wash/wipe system to be removed prior to MOT as i had authorised my mechanic to do so, but it surprisingly came back with the system still in place).

So for this year at least happy days!