Protecting fruit from birds/squirrels

Having said that I didn't have problems with squirrels, I found a squirrel in the raspberry cage this evening. I wondered what was nibbling half a berry and leaving the other half on the floor, thought it might be mice.

I encouraged him out and checked round for entry holes and found none, but I know for a fact they're clever blighters.

Just bumping this while I seek inspiration on protecting the soft fruit from the birds - mainly woodpigeons and blackbirds. The Pigeons are so heavy that they are snapping the branches of the currant bushes. The red currants have been stripped already.
I've had this problem every year and still haven't come up with a solution that works for me.
I'm going to take lots of cuttings and hope that, by planting out time, I will have a cunning fruity plan!

I have two fruit cages with semi rigid plastic net sides and a soft net roof. Last year I suffered greatly from mice, squirrels eating holes in the plastic and wasps. This year is completely different. No squirrels yet, nor mice, the wasp season is yet to come.

Walking up the garden I spied a baby long tailed tit fluffing about inside the cage. I opened the door told it it was silly and encouraged it out, failing miserably. All the while looking for the hole round the sides where it might have gotten in. Then lo and behold, the little bird stuck it's head through the soft net roof and squeezed itself out through the mesh. I hope I doesn't tell its mates.