Interesting, have you got a part number for the blades from Halford for the rear Markirel, I do need a set myself now after two years of being at the back.
Yes still got the packaging in the garage because they are supplied in packs of two. It's Halfords part number R03 which is for 400mm wiper refills. They need to be trimmed to length but work a treat. No point replacing the assembly, with the chunky plastic cover on the outside mine still looked like new.
any ideas ?
Time to part with money I'm afraid. No quick fixes. Mine jumped around the rear screen like a crazed raver and was about as useful (and noisy) as well.