Thanks for all the fantastic replies!
Never thought of trying a rotary cutter... certainly sounds better than scissors (I have arthritis & hypermobility so prolonged scissor use can leave me v uncomfy) so will have a nosey at them too. Am going to put either rotary cutter or scissors on my Christmas list for this year - my lovely Mum's saved me having to cut more fabric for a while as she's said I can have her rag rug stuff (including tools, hessian & a black bin bag full of fabric already cut into strips). She's going to concentrate more on knitting as that doesn't seem to cause so much problem with her arthritis.