Does anyone know of a car seat that will be acceptable to Easyjet? Apparently it must be less than 42cms wide (therefore ruling out all the Britax models), with a rigid plastic or metal frame (i.e. no polystyrene), forward facing with a four (or presumably five) point harness and fixable with the airline lap belt. I need to take 20 month old twins on a flight & of course only one of them can sit on my lap! Any advice appreciated