John Short - who actually sang shanties for his living also agreed with Whall, and Terry, and Sharp: the English shantyman always sang 'shannadore', or a close approximation. Oh, and by the way, while advice is being given to us Brits, it's a shanty - a capstan shanty according to most authorities - and would therefore be sung in rhythm and at capstan speed - not as 'an American folk song'!