Front wheels chocked, back wheels off, Axle stands and back up Axles stands in place. Downpour.....
Got some WD40 on the Armstrong bracket nuts. Having a closer look - they are a mixture of hexhead, and cross slotted mushroom head bolts. These mushroom head things are all over the car - I think the previous owner had shares in the company. They are the work of the devil, as the cross head is difficult to get a purchase on, and you can't get a set of Mole grips on them. Needless to say, they won't be going back on!