Further protection for a buses. . . Ikea are doing a cheap deal on large fire extinguishers if you are part of the Ikea family. http://www.ikea.com/gb/en/catalog/products/70143350/ I would strongly advise people to take advantage of this.
If you are a costco member its £11 for a 1kg powder extinguisher. I got mine from ebay £10 for a 1kg jobbie