OK, I've netted. Could well be blackbirds - there is a whole family of them hanging about the veg/fruit patch at the moment. Hadn't thought much more about it but now you mention it...... Problem is I can net my strawberries easily because they're all together but I've also edged the kids beds with runners which are fruiting nicely and I'd told them they could have all their own strawberries for themselves. Suspect there won't be much left of theirs - and I can't net them. Oh, and now they've got a taste for soft fruit, raspberries and currants will no doubt be next.
H