Thanks alot for that, much appreciated 👍
The 20 pound note in the arse crack sounds like the perfect ice breaker 🤣
General equitte is pay the person on the front desk for th massage. Strip off and ask the pants question. If they say pants off is available then go with it. They then do the massage for about half the time. If they "accidentally" touch your bits then say it feels nice. Just before they ask you to turn over you might get a whisper in your ear asking if you want anything extra. Ask how much and then decline the first price they offer. Offer £10 to £20 lower and be prepared to go up by £10 and confirm what you'll get for the extra. Have some money in your trouser pocket ready to use should they ask for payment upfront. Pay or agree to pay at end and then go with the flow. You can ask for more and they'll ask for more and you an agree or not. If you can't agree on an acceptable price for the extras then say no and give the SP time to think and she may come back with a more acceptable price but be prepared to go up a bit from your original price.
Take your own condom just in case the opportunity arises for more money.
Be respectful and polite at all times and you should get a positive outcome.
I think they expect a bit of a haggle and it shows that it's not your first rodeo, but don't take the piss with super lower offers. The SP will start high to see if you'll pay it and see if you know the going price. She might ask what you normally pay for a particular service. Once you've shown interest in extras, the SP will be keen to get some extra money out of you, so is likely to accept a respectable offer.