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Basically yes.
You'd need to check that the electrician is happy with chasing them in. Often they're "not my job" personalities.
But probably worth getting one in to talk to them. They may well be happy for you to do the cable cutting, chasing.
Risk is they may end up uncovering things no longer to regs and then want to do a full rewire.
As a suggestion I'd think about having ethernet cable run at the same time.
Grateful for some advice, I've got no idea about this stuff - I've got a lot of exposed cables in the flat. Also guessing my electrics are old - changed a ceiling light and have red and black cables in addition to brown and blue.
If I want these chased into the walls, I guess I'd first get in an electrician then a plasterer? (Some of these walls / pillars are also concrete..) Any advice welcome...