I popped into Wilkinson's the weekend (not a shop I venture often, honest) and found they do cycle bits. I was able to pick up a bike cover for around £3 and a sprocket cleaner for £2. they did other stuff there too so if your on a budget pop by.
Its not something I care to share with everyone. But I was in there for a good deed and I was buying my Nan a new Airer for her house, rather than doing my weekly shopping in there, thats the honest truth