"Set Square" wrote [slightly re-ordered]
| John wrote:
| As my next project for her she wants me to 'knock' the
| bathroom and toilet room into one, and install a new
| suite, tiles etc. ... The two rooms are separated by a
| stud wall, it is approx 3" wide, and is hollow all
| over, and as far as I can see has no load bearing purpose at all.
| Removing the wall would come within the scope of the building regs
| if it is structural.

Walls between rooms, and changing the layout of rooms, closing up doors etc,
is subject to building regulations irrespective of whether the wall is
'structural' or not.

| I will also have to change the lighting a little as the existing
| bathroom light is on a pull switch, but the toilet light is on a
| normal switch which will be inside the new bathroom. She
| wants only one central light and a pull cord putting in the
| 'toilet side' and the other one removing. I have the capabilities
| to do this but can I, with this new Part P regulation?

As you will need to make a B Regs application for removing the wall and
closing up a door anyway, simply add the wiring to the same application.
Then you may do the work yourself.

Owain