2 bikes on hangers, d-locked frame to frame in the (brick) shed, and then chain to a wall anchor
another 2 d-locked frame to frame in the house, no wall anchor
maybe not perfect, but it would be impossible to get the two bikes out through the door locked together.
I had one mate bury a 6 foot piece of railway line under the shed – the end poking up as a central locking post, so you could lock bikes both sides with a D-lock through the bolt holes
another mate put a full sheet of galvanised steel concrete reinforcement mesh on one wall of the garage – loads of really secure attachment points, so the bikes could be locked individually and with loads of places to hang other things on too – worked very well.