we used the asda one and made a few holes in the bottom for ventilation. still had to stnd the tray on bricks as was too close to the ground. Did us really well all week and then we threw it away as noone had any space in the car but at £1.97 we could hardley complain.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.