I replied on the 25th October. The only thing I didn't answer was the definition of the glasses, but I assumed you just needed confirmation that they were Chance.
The tankard may not be Chance but it could possibly be decorating a Sherdley blank. Impossible to say without seeing a photo. Might be best to start a new thread for this.
The transfers were made as 'open stock', probably by Johnson Matthey. Open stock transfers were available to anyone, so you may see the same transfers appearing on ceramics as well as other glass items from other makers - sometimes even on French glass. Chance occasionally used open stock, but most of its decorated ware was made by (and sometimes designed by) Johnson Matthey, exclusively for Chance.