QDR Solicitors is a trading name for Wright Hassall. See the link to Wright Hassall
According to the Law Society there are 14 solicitors working for QDR but in effect they are all working for Wright Hassall but changing the letterheads to hide the fact they are WH.
As with all so-called "debt" collectors, you can ignore them and wait to see if you actually get a claim - rather than the endless threats of one.
Address: Olympus Avenue, Leamington Spa CV34 6BF