OP
Octopus
As stated in my first post. The reason I have asked on here is not because I am carrying out this work myself, ( I am a Landlord and know its not worth the risk) it is because I have had two electricians in that have given me two conflicting answers. Hence, I thought I would get an understanding myself so I can make an informed choice based on others knowledge. Thanks for your concern Murdoch but you can call the Regulation card on some other thread.
You've lost me.....
As a Landlord you will fully understand the need to understand ALL the relevant regulations and your duty of care towards your tenants...... which you have acknowledged.
As for your "conflicting" sparks advice - maybe get a better one who fully understands the regs?