This company go way, way above and beyond the simple supply of goods. Having been spectacularly let down by another supplier and faced with the nightmare of having to test 15 singers in 24 hours or lose all their trips home - Chris - responded in person with a solution dreamt up by him. He gets up at 5 am (yes that's right 5 am) intercepts the tour bus as it travels through the night from Glasgow to Heathrow at Warwick Services, gives them a quick lesson on usage, goes back and prioritises the results as they come through in Scotland. AND rings me personally to ensure smooth progress. This company has genuinely provided the best service of any supplier I have ever dealt with.