Hmm, are you sure there's no one you know within a professional position? If it's the same as passport countersigning here is a list of all the people that fall under a "professional" status
Examples of recognised professions include:
accountant
airline pilot
articled clerk of a limited company
assurance agent of recognised company
bank or building society official
barrister
chairman or director of a limited company
chiropodist
commissioner for oaths
councillor, for example local or county
civil servant (permanent)
dentist
director, manager or personnel officer of a VAT-registered company
engineer with professional qualifications
financial services intermediary, for example a stockbroker or insurance broker
fire service official
funeral director
insurance agent (full time) of a recognised company
journalist
Justice of the Peace
legal secretary (fellow or associate member of the Institute of Legal Secretaries and PAs)
licensee of a public house
local government officer
manager or personnel officer of a limited company
member, associate or fellow of a professional body
Member of Parliament
Merchant Navy officer
minister of a recognised religion (including Christian Science)
nurse (RGN or RMN)
officer of the armed services
optician
paralegal (certified paralegal, qualified paralegal or associate member of the Institute of Paralegals)
person with honours, for example an OBE or MBE
pharmacist
photographer (professional)
police officer
Post Office official
president or secretary of a recognised organisation
Salvation Army officer
social worker
solicitor
surveyor
teacher or lecturer
trade union officer
travel agent (qualified)
valuer or auctioneer (fellow or associate members of the incorporated society)
Warrant Officers and Chief Petty Officers