Well, got a heavy duty stapler . . . . eventually! Didn't go to B&Q as the general reviews of the one I was looking at said it was cr@p! Spotted one in Wilco, good reviews, sensible price, went up, not in stock
Gave up and came home, stopped off in Musselburgh to get butter. Looked into B&M to get ciggy filters, there on the shelf is a heavy duty stapler . . . . according to their website they don't stock heavy duty staplers
Bought it.
What I'm struggling with now is plastic to line the planters, I thought mullering heavy duty bin liners would do but can't find any big enough.