We've just returned and I echo the views that the pushchairs you can hire look awful, though I understand they need to be functional and durable. We went by Eurostar and took our full size pushchair, but don't know why people wouldn't take a lightweight stroller if their child needed it. Indeed, a lot of the children I saw in the hired pushchairs were big enough to walk to be honest. Parade viewing was fine, DS being sat in the pushchair meant he could get a decent view when parked up behind someone sat on the floor.