As you would expect Thornton Precision Components hold customer approvals too numerous to mention here but include:-

B-EN ISO 9002-94
EN ISO 9002-94
ISO 9002-94
Deutscher Akkreditierungs Rat
EN 46002
TS 157
Civil Aviation Authority (Approval No. 881115)
Rolls-Royce
Pratt & Whitney
British Aerospace
GKN Westland Structures, Transmission
Short Brothers
Lucas Aerospace
Meggitt Aerospace
I.H.I.
Singapore
Dowty Aerospace
Alstom