Alexander Dennis Limited (ADL) is the UK bus and coach market leader and the world's largest manufacturer of double deck buse ... s. We're part of leading independent global bus manufacturer NFI Group. Alexander Dennis produces a wide range of innovative and fuel efficient single and double deck buses, plus a full portfolio of coaches under the Plaxton brand. Alexander Dennis products offer real operator, passenger and environment benefits, all backed by an unswerving commitment to world class customer support. read more