Treka and Mellor will continue to trade as separate brands and be run by their existing management teams. Mark Clissett, the founder of Treka, will remain as a consultant to that company.
Treka has two sites in Brighouse, West Yorkshire, and offers a range of high floor coachbuilt vehicles and minibuses.
Mellor Coachcraft is based in Rochdale and Scarborough, and produces low floor coachbuilt small buses with both diesel and electric drive trains.
Clissett said: “I am very proud of what we have achieved at Treka and see this transaction as the next natural evolution in its lifecycle. I will remain involved with the business and am delighted that my son, Morgan, will now assume the role of managing director of Treka. I also believe the rest of the management team and staff have a great future ahead alongside their new colleagues.”
As well as Mellor Coachcraft, WNHL Group businesses include Coleman Milne and Coleman Milne Specialist Vehicles.
John Randerson, managing director of Woodall Nicholson Bus Division, described the acquisition as “an excellent opportunity for both businesses”, with their complementary products.
He added: “We will be able to take engineering best practice from both businesses and look at the possibility of introducing new products, such as using our electric vehicle expertise with Treka.”