Do you shop on-line? If so, why don't complete your purchase by going through Easy Fundraising website:
Easy Fundraising Website
Make Sutton Grammar school as your nominated charity. Retailers who participate in this scheme will make a donation to Sutton Grammar PTA.
For those who do use Easy Fundraising (and new joiners), if you are a UK tax payer, could you consider to ‘Gift Aid’ your donation. Sutton Grammar PTA would then get 25p extra for every pound donated. So effectively £1 becomes £1.25.