Head of the River Race only open to men's eights and is considered to be the peak of the head race season — attracting the top UK crews as well as foreign clubs. Composite crews, drawn from more than one club or institution, are not permitted. The Championship Course is that of the Oxford and Cambridge Boat Race but, unlike the Boat Race, the Head of the River Race is raced on an ebb tide from Mortlake to Putney. The starting time for the race is different every year and depends on the tide — the first crew (winner from the previous year) starts the
Putney as Scio House Hospital for Officers, Putney. It has since been redveloped as a gated community of 70 neo-Georgian homes divided between two streets. Putney Heath is around less the nascent A3 road in size and rises to above sea level. Because of its elevation, from 1796 to 1816 Putney Heath hosted a station in the shutter telegraph chain, which connected the Admiralty in London to its naval ships in Portsmouth. One of 10 signal stations with telescopes making observation of the next station's signal, a message could be sent from the Admiralty to Portsmouth within 15 minutes. This was