Hi, yes! I am enclined to agree with you flying free, since investigating further, based upon the info. provided. I do think it is Davidson, however, not fully convinced yet, in respect of Lustrousstone,s comments, which have shed a cloud on the identity. The Bowl does not appear to be built of layers, which would conclude as being cased. Between the thinkness of the glass, you can clearly see small air pockets, which will I hope, verify as not being cased. The weight alone I would considered, as a key factor in determining whether cased or not.

Hopefully someone will be able to shed some light. I first thought that it could be Whitefriars and having carried out some research, has y made me confused. To add a catalyst to my confusion, there is currently on Ebay, two items that are the same and of similar pattern design to mine, however, one states as being Whitefriars and the other Davidson. Mmmmmmmm!
The Ebay item No's are:
280630505484 and 120838323604. I am aware that there are some past threads that I need to look into as one similar to mine but in blue was being discussed.