Torque wrench calibration

[Cooper1999]

Can anyone suggest where I can get this done at a reasonable cost? I've got an engine to rebuild and want to know the wrenches are reading correctly.
The nearer to Ashington the better, but also work in Darlington.

Cheers.

[Cooper1999]

Getting them done at htl in Cramlington, if you're interested.
Thanks for your help.