That's a positive... I emailed DR three times about a duff G in the Black Beauties I bought and didn't get a thing in response. Guess who's never buying DRs again?
The JHS website shows this as their registered office:
John Hornby Skewes & Co. Ltd.
Salem House, Parkinson Approach, Garforth, Leeds LS25 2HR, UK.
Tel: +44 (0) 113 286 5381
But it also says: "Please note, as TRADE ONLY distributors we do not sell direct to the general public". Will that affect your string issue? From whom did you actually buy them?