Lucy, so go to the GP. He/she will probably do the referral without a problem, as he/she won't want to deal with it! LOL! Truly, I bet you will be treated just fine, and get the proper referral you need. Here in the states, I had a different route. I found the right person to go to, and went, then got insurance to agree to pay for it! Took some doing and many phone calls, LOL! Thank goodness I live in a reasonably TG friendly place, at least parts of here!
Hugs!