GPs do not provide an occupational health service as part of their NHS responsibility nor can they provide this service to you even if you are willing to pay for it.
Under Health and Safety Regulations, your employer or University/College has a duty to provide a safe working environment, and should provide this vaccination.
GPs are not obliged to provide the hepatitis B vaccine on the NHS.
We advise you to contact your employer or University/College and refer them to this page on our website. They will be able to make arrangements with an occupational health provider for the provision of any immunisation which you may require following an appropriate assessment.