Seajet
...
And the Guards in their red coats around London's palaces may just make a tiny contribution to the tourist industry, as well as their day job of being part of the over stretched infantry component of the armed forces.
So let them be a privately funded unit; tanks are obsolete, and this lot poncing around were long before them !
Might as well hire ' resting ' actors and leave the real soldiers to do their job ( and pay for decent accomodation for them )...