My daft husband has been trying, in his head, to design a small cart on rubber wheels, just large enough to accommodate the cygnets and adults, which he could pull along the road to save their struggling babies. One side of this contraption would be a ramp, which one would swing up once the family was on board.
He thinks I could walk behind with a flag to alert motorists (twice a day!).

He can't believe that the main snag to this Heath Robinson idea is that the swans won't get on board, they'll attack him in a big way.

However, I'd love to see it working. Imagine a very black African wearing his national costume (bright purple today) pulling a cart full of swans along, with a fat elderly white lady walking behind waving a large St George's flag (we've had it since the World Cup a few years ago)

Sounds like a scene from Monty Python!