The lab address is: Oil Analysis Laboratories, unit 5, creamery business park, station road, mochdre, Colwyn Bay, LL28 5EF, UK. If you have one of our sample kits you will have either: A self addressed envelope, which you need to arrange postage and pay for return, or, a freepost bag which you can send Royal Mail and the postage is already paid, or you have a LubeWear Swift bag. The telephone number for booking a LubeWear swift collection will be on the outside of the bag and is required for collection. Please call the lab if you do not have a LubeWear Swift bag.