Old Kitchen Room to office - walls are bad

Thoughts and opinions on how I should tidy up the walls of our former Kitchen?

This room no longer houses our cooking/eating activities, I've stripped most of it out and intend to convert it into a day room/office for my wife.

The walls are mostly brick with about 15mm plaster on surface. They have been well roughed up with cable runs and old tiling etc.

I intend to tidy up and relocate a lot of the sockets.

Should I
1. relocate sockets/switches then have the whole lot skimmed

2. Do electrical work then dot + dab plasterboard all over the offending mess

3. Consider something else?

No 1.

No point dot and dabbing - you'd only need to skim that as well. Besides, it makes the room smaller.

Agreed, number 1.

Strip the wallpaper and buy a bag of hardwall (base coat plaster). Use the hardwall to fill the chases and holes from the old back boxes before the plasterer comes.