Depending upon the job, a locksmiths price will vary. Also, where you are in the country will affect prices. Some areas of the country are more expensive to live in than others, London being a prime example, and this will be reflected in the price. Some locksmiths may quote you for labour plus parts, others may charge an hourly rate and others will have a fixed “all in” price.
The threshold for VAT registration is quite high and some locksmiths may not charge VAT. It’s best to get in touch with your local locksmith and agree prices before work begins.