On the foreshore of the river Thames, just opposite the MI6 headquarters at Vauxhall, London, some old timbers – a series of posts or piles driven into the riverbed – have been discovered peeping out of the water at low tide. Two Bronze Age spearheads, around 3,000 years old, have also been found thrust hard into the foreshore nearby. Could these timbers be the remains of London's first bridge or the supports of a platform where Bronze-Age people made offerings to the river gods? As usual, Time Team has just three days to find out.