2010 CRV Starting Issues

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Family friend recently bought a 2010 CRV diesel.
Occasionally it refuses to start, not even attempting to crank.
I know these cars have a very common problem with the barrel, is there any experts near Coventry that can repair it? I've looked at the guide on YouTube and I know I'll screw it up.

Garage wants £600 to replace and recode etc

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Key wont turn to crank properly, messing with the wheel to turn off the wheel lock usually sorts it, so guessing it an issue with the wheel lock and barrel