Sorry for not responding to your advice suggestions. We are having a new kitchen put in so no brewing, no time and no kitchen to work in. At the moment the garage where all my beer is stored is really chocker with new kitchen stuff and I can't get in. I have just had to buy some beer!
Are there any commercial brewers using 330ml bottles which can be reused. I can encourage my sons to buy that particular brand and save the empties for me to use.
Many thanks