I'll guess I'll see what the GP says tomorrow.
GP wasn't hesitant to prescribe at all, to the point that he gave me the prescription for 12 weeks worth of terbinafine along with the sample jar for some toenail clippings and a form for a liver function test. He did say to wait for the test results before starting the medication though (I'll wait until I've got the results before filling the prescription). 3 monthly liver function tests from then on.
No specific warnings about booze although I did say that I was keeping an eye on my drinking and keeping it down to more reasonable levels.
No point using the topical nail paint stuff now as it isn't going to get under the nail properly or do anything for the skin on my feet.
8.30am appointment, walked out of the surgery at 8.43am having had the doctors appointment and being seen straight away by the practice nurse to give a blood sample (and a quick checkup for weight/smoking/booze/BP). Amazing when it works like this!