Would like to put a DAB radio/CD player in my car (Citroen C3 Picasso) Halfords sell all the necessaries. should I pay them £30 to fit or is it a simple job to tackle myself?

Does the £30 include fitting a DAB antenna as well?

Fitting service at halfords is variable depending on the branch.

I’ve had excellent and total crap before, maybe see if you can find info on the particular location before choosing.

£30 is just for fitting. Antenna, extra wiring harness to link to steering wheel controls are extra.

Either DIY, or find a good independent car audio specialist. I had a head unit fitted by Halfords, it took the bloke nearly three hours to install the unit, a fairly fancy Alpine, it involved getting the head-unit to work with my Genesis amp, which was never quite right afterwards, and when I bought a DAB unit, (from Halfords), I found a fairly local outfit who did the install in around an hour, including fixing the bodged wiring that the Halfords bloke had done.
Still using the little stick-on windscreen antenna, but I’m getting them to fit a proper antenna soon; no way will I trust Halfords to do the job, I’ve been into the shop three times to find out what they’d charge, and waited around for fifteen-twenty minutes without managing to find someone to actually talk to!
Really, avoid at all costs.

How to take stereo out video suggests it’s a 5 minute job to take it out.
DAB aerial is about 30 minutes to run the cable and replace the trim alongside the windscreen.
The interface between the stalk controls on the wheel are a straightforward plug and play from Car Audio Direct or eBay , they fit between the car wiring loom and the stereo. Hour tops to do it if you have everything ready to go. Delays for fetching the mounting hardware may be needed.