HAMAX Siesta childseat, £94.99, www.fisheroutdoor.co.uk

The Siesta is a rear-mounted childseat suitable for children from 9 months and up to 22kg. It is quick and easy to remove being mounted by a single bracket on the seat-tube (which doesn’t foul gear cables). The seat cantilevers from this point which provides excellent suspension and eliminates jarring over rough ground. The one bracket fitting also means that the bike doesn’t need an additional pannier rack to be permanently fitted. The child is kept safe and secure with twin buckled straps and adjustable footrests. Further comfort is provided by a reclining cushioned seat which prevents slumbering children from lolling awkwardly forward. 

PROS comfort (suspension and reclining)  
CONS pricey if on a tight budget