Hi I would like to add two extra double plug sockets in my living room as I currently only have three and need to use a load of extension cables. My first question is whether it is actually possible to do this? My next question is if it is possible to do would I need to dig into floors and walls for the wiring? I’m getting ready to decorate so if it is messy I’d obviously want to get it done first. Lastly what would the approximate cost be? Thanks in advance for your help! Alexandra