I have just posted the following on the Thorntons FB page.
"Really really unhappy.
I have a severe dairy allergy, and recently discovered the joy of being able to go into your coffee shops and be able to eat cake.
Namely, your gluten and dairy-free Brownie, and your Gluten and Dairy-free chocolate and orange cake.
I went today, to find that NOT ONLY had you changed the Brownie to no longer gluten and dairy-free, but also the chocolate and orange cake is also now containing milk.....and you have not put up a sign letting people know.
I only know as the very teeny tiny sing was different....the one sating the name of said cake - namely the brownie. I then asked them to check the chocolate and orange cake, and altho did still claim to be dairy free on the sign, the man behind the counter said it wasn;t.
Good job I checked....I would otherwise be very very very ill and possibly dead by now if not.
Now, for starters, why change something and now lose customers (not only me, but my friends and family won;t be going in), and why also not let people know and risk killing someone on your premises??"
What makes the above worse in that Nero coffee shop used to make a very lovely dairy-free cake - carrot cake - which they decided needed coconut in. Now, anyone who LIKES coconut might not mind, that, but I hate the stuff, and also, it kind of made the carrot cake now more like coconut cake..
I complained, they removed it completely rather than changed it back 
.
Starbucks....they did a lovely dairy-free cake too. They just stopped making it, randomly
.
And Costa never actually made anything anyway, altho I have since heard they make a giant Bourbon biscuit, so I might get lucky if they make it to the proper recipe (yet to find out).
Feeling at the stage that I am unable to eat cake anywhere....which surely by anybodies standards is pretty sad