@jamibann Right - as soon as you sign up to have your gas delivered by this company, they will bring you a new tank. Used mostly by houses in rural areas. :)
@juliedduncan OK, I get it. We have one of those in Scotland (albeit a much older version as its been there for years). The rural areas there are not on mains gas supply either, unfortunately, as it's a much more expensive way to heat the house. But you can't have what doesn't exist!