Pushchair reccomendations?

This is more for the UK parents tbh, unless anyone knows of 'global' options. I have a cosatto woosh double at the moment for my two toddlers but the older one has met the weight limit. In fact I'd say he's probably outgrown in, i've had to replace the front wheels three times but its hard to get him weighed. He has additional needs so very much still needs the pushchair, younger hasn't long just turned one and isn't yet walking so also still needs the pushchair. Does anyone know of any double pushchair with a high weight limit?