Situated in the north west of England on the south coast of Morecambe Bay, the port of Heysham provides an excellent range of services to a variety of port users (in addition to high-speed SeaCat passenger services to the Isle of Man and Belfast). Companies who have used the port include Esso, Conoco, Feria, British Gas, Shell, Kelt, BP, Elf and Amoco. Measured in tonnage throughput terms, Heysham's trade over the last six years has doubled, largely due to the growing ferry and offshore trades and now accounts for some 4 million tonnes per annum.