It may surprise people to find out that many of the "names" in the carpet underlay world are owned by the same companies. There has been a lot of buying out over the last few year, and its sometimes tricky to work out which organisation owns which brand..
Duraly took over Tredaire in 2002, which was then managed by a financial trust. So the "competition" between the two is not a real one.
Most underlay in the UK is made in the UK, but the perceived comptition is not always what it seems.