At home I drink Rocks.
Pubs can be very difficult to get anything without sweetners, unless your're advocating drinking and driving, which I don't. Often the choice is down to tiny extortionate glass bottles of orange juice or coke. I'm hardly going to keep the pub trading on a pint of tap water.
Strongbow also has sweetners. The other thing is that it's difficult to check.
I can get away with a weak lime and soda as it's supposed to be sour and is less sweetened to a sweet taste, but that's a risky strategy depending on the quanity of lime.
People don't seem to realise that diet or not, there is very little choice of sweetner free products, and those that are, are premium products costing many times more regardless of the sugar tax.
If brands like Ribena, Vimto, Schweps, R Whites etc still did original recipe options without sweetners, I would still buy them. And the whole purpose of Lucozade was to be an energy drink for sports or ill people which is purposeless now.
I'm another that gets the headaches, cloying after taste for hours and increased thirst. Stevia just tastes like soap.
(And yes, I can taste palm oiled "chocolate" thank goodness for Aldi Moser Roth)