I found this on the website
Acceptable countersignatures:
* Accountant
* Airline Pilots
* Articled clerk of a limited company
* Assurance agent of recognised company
* Bank/building society official
* Barrister
* British Computer Society (BCS) - Professional grades which are Associate (AMBCS), Member (MBCS), Fellow (FBCS) (PN 25/2003)
* Broker
* Chairman/director of limited company
* Chemist
* Chiropodist
* Christian Science practitioner
* Commissioner of oaths
* Councillor: local or county
* Civil servant (permanent)
* Dentist
* Designated Premises Supervisors
* Director/Manager of a VAT registered Charity
* Director/Manager/Personnel Officer of a VAT registered Company
* Engineer (with professional qualifications)
* Fire service official
* Funeral director
* Insurance agent (full time) of a recognised company
* Journalist
* Justice of the Peace
* Legal secretary (members and fellows of the Institute of legal secretaries)
* Local government officer
* Manager/Personnel officer (of limited company)
* Member of Parliament
* Merchant Navy officer
* Minister of a recognised religion
* Nurse (RGN and RMN)
* Officer of the armed services (active or retired)
* Optician
* Person with honours (e.g. OBE MBE etc.)
* Personal Licensee Holders
* Photographer (professional)
* Police officer
* Post Office official
* President/Secretary of a recognised organisation
* Salvation Army officer
* Social worker
* Solicitor
* Surveyor
* Teacher, lecturer
* Trade union officer
* Travel agency (qualified)
* Valuers and auctioneers (fellow and associate members of the incorporated society)
* Warrant officers and Chief Petty Officers