Thanks Gremlin, I will try a 10 mm socket on the nearside cluster. I guess that will save my fingers and thumbs some work. Hywel, I had no idea you could get longlife S&T bulbs . I don't recall ever seeing them.
On a side note, with all the rain we've had in the last few days, I wondered if removing the cluster might reveal some moisture. But no, everything in and around was clean, dry and very shiny.
B Max Titanium X 1.0 125 bhp in Magnetic with built in SatNav and rear sensors.