A burial at sea, is not only an option for former sailors or Naval personnel, but an option available to everybody. In recent times it hasn't been that popular in the UK, with only a few dozen being carried out each year, at only 2 designated sites in England. Its popularity however, is suggested to be on the increase, as the strict regulations surrounding Sea burial mean it's quite a green way to go.
Most of the information below can also be found by clicking on the following link for the government department responcible, called the Marine Management Organisation.
Alternatively contact Britannia Shipping at www.burialatsea.co.uk who are one of the few companies offering such a service.