Can empty slots in fuse board be used to put a circuit of switches in the upstairs of the house?

In most cases empty slots in a consumer unit can be adapted fairly easily by fitting in additional circuit breakers. It's difficult to say 100% without looking, but sometimes the copper "busbar" below the circuit breakers may need to be changed to a longer one if it does not already reach as far as the empty positions. As removing the consumer unit cover will expose live parts, it is strongly recommended that this if left to a Part P competent electrician to check. With regards to extra switches, I wonder if you're confusing light switches with plug sockets? It's much easier to convert an existing single plug socket into a twin socket, as it should not be necessary to install any extra cables. Obviously there would be some disturbance to the wall as the new metal back box will need to be chased into the wall and the plasterwork made good on completion. For light switches, changing a single light switch into a double to control another light is more complicated and will almost certainly require additional cabling to be installed. If you're planning on doing the work yourself, then you will need to register your intent to carry out the work with your local authority building control department and pay the relevant fee (approx. £200-£300). - see link below for more information. If it's just a few extra sockets, it's probably going to be a lot cheaper to post a job on this website and get a certified part P electrician to do the work for you. It should also be pointed out that all new sockets will need to be RCD protected, so if your existing consumer unit does not already have an RCD to protect against fatal electric shock, then an RCD will also need to be installed in order to make the alterations compliant with BS7671:2008 http://www.donttakethep.co.uk/ http://www.esc.org.uk/fileadmin/user_upload/documents/public/leaflets/PartP-Web-Oct2012-1.pdf

Before any electrical work is done i always check maximum demand that the system can handle safely.otherwise you risk overloading.sickets can be adapted but knowing what you are doing is important as you might have final ring circuits and it would be easy to mix them up creating a ring within a ring