You can make this one yourself - all you need is a flowerpot and a bit of tube or pipe more than 18mm in diameter.

Sink an upturned >20cm diameter flower pot into the ground. Put a slate/ tile over the drainage holes to keep out rain. Run a  hose or pipe underground to the pot, leaving a prominent entrance. Be sure to make drainage holes in the pipe.

Again, make a chicken-wire cradle for ventilation, and fill with a generous handful of nesting material.

Some bumblebee species nest above ground, and they occasionally use bird nesting boxes. Unlike birds, they never collect nesting material, so you`ll have to put some in the box for them. 

Any bird box would probably do, but you could try these excellent value “roosting pockets” £3 each and add a `hat` to keep the rain out. An alternative roofed design is also available - 10% of sales go to BBCT

Hang them somewhere shady and sheltered, perhaps in a hedge, 0.5 - 2m above the ground. Try to reduce the size of the entrance hole, otherwise birds will probably move in!