I'm not 100% sure about this piece. I'm about 70% FOR Mdina during the 1980s, when they also produced a range of, usually, blue glass with applied gold foil. Of course, I would imagine they did this after seeing the success of Michael's globally popular Azurene range.
The colour tone seems right for Mdina at this time, and I have seen a few vases (Side Stripe, Onion and Lollipop) like this one and the one on eBay with Mdina inscribed marks or labels.
What puts me off is the fact the foil goes under the base, as Ron says, and also the applied colourless rim. I'm yet to see a piece of Mdina from this range with an applied rim like this. However, Side Stripe vases have applied trails to two sides in colourless glass, so it's not a stretch of the imagination to see that a glassmaker may have tried applying a rim to a cylinder vase one day to see what it looked like.
Incidentally, I don't think it's Charlie Meaker, as the blue is completely wrong compared to the examples I've seen before.
Is the jury still out?