SafeKleen in my experience are expensive. They recently bought out Midland Degreasing who used to do our waste collection ( about £45 per 205 ltr barrel ). They put it up to about £80 overnight and had a 'tough s**t' attitude. I did some calling around and found a local firm called B&M Salvage ( based in Blackpool I think ) that were about £30 per barrel, prompt and helpful. Now I don't know how far they travel but I will post their details on the buyers guide board tomorrow, worth a call.