I think he may be right about the special locations
Quick scan of google
Building Regulations Part P
From 1 January 2005 the design, installation, inspection and testing of electrical installations will be controlled under the Building Regulations.
The new Part P will apply mainly to dwelling houses and flats including gardens and outbuildings such as sheds, detached garages and greenhouses.
Small jobs such as provision of a socket-outlet or a light switch on an existing circuit will not need to be notified to Building Control (although there will be some exceptions for high risk areas such as kitchens and bathrooms).*
All work that involves adding a new circuit to a dwelling, or electrical work in kitchens and bathrooms or in 'special locations' (see table) will need to be either notified to Building Control with a building regulation application or carried out by a competent person who is registered with a Part P Self-Certification Scheme.******