So this thread has had me curious - as a regular visitor to Morecambe, hoping for a decent WG to appear in town is my main/only reason for visiting the North West page on here. And all my memories of TaTa getting mentioned on here were of it being confirmed as 100% legitimate.
So I just did a quick search. Seems you guys have had this conversation before!
https://www.ukpunting.com/index.php?topic=337213.0In that thread legitimacy was 100% confirmed.
I thought it had been discussed more often, but there was only a couple of other threads, both implying legitimacy - although at least one talked as much about the problems confirming availability of extras give these places, which could be read so the implied legitimacy was actually implying the opposite?
As you were both a part of all previous threads, maybe we conclude Scutty just got lucky? There's no reviews to judge anyone else's experience by so

Given past information and the prominence of the parlour's location though, my opinion (with no real facts to back it up) is that they're legitimate. My friends in the area (who as far as I know don't punt) have never mentioned TaTa when the conversation heads in the general direction of adult entertainment (it's usually mostly derogatory comments about Blackpool!), but have made occasional comment about Topaz being a known thing in the area (although not by name, just approximate location).