@Maria7 : search www.toolstation.com for 'mattock head': I bought one a few months ago, and it works really well for lifting turf, and digging up stony or compacted ground.
@GrandBob : gravel boards are (roughly) 6"x1" boards that go along the bottom of fences. Try looking for fencing laths, perhaps: but that's about the size of what you want.
@Reg Simpson : I bought bags of sharp sand from Wickes, instead of pricey horticultural sand. Sharp sand drains better than builders sand, which is too round (I believe), and doesn't help drainage. You have to be careful of lime and salt: they're the risks with non-horticultural grit, but I've been ok so far.
@WeedFairy : I really like Joseph Bentley forks & spades, which haven't bent on me yet. They've got nice ash handles, and are a good length.