I recently had to make TWO appointments via C&B, for unrelated things.
I live within a mile of hospitals that specialise in the two things I needed tested. My C&B forms offered me half a dozen places between 20 and 50 miles away...
THEN when I tried the net, all the hospitals turned out to be "not on the system yet".
And when I phoned the helpline, same answer. We can't do it they said, sorry, talk to your GP.
In the end I called the local hospitals direct, getting their numbers from yellow-pages. Appts sorted. No issues, except for the giggling when I mentioned C&B.
And then for WEEKS afterwards, the C&B system kept sending me 'reminders' that I had to book - with commentary to the effect that my failure to respond would be regarded as hostile, my notes would list me as a troublemaker, I'd be billed for wasted time etc etc. At least, that's how it felt.