Jim mate don't upset them now or they may decline your reference. Do what I did mate. Leave get a new job then stitch them up.

Look around while you are there and keep your eyes open for breaches of health and safety and use those. My last job had insufficient lighting in part of the office and this was reported by one of the girls that left. The company were given a rollocking and had to spend a fortune having new lighting put up in that area of the office.