[widey] Personal preference depending on where you went into knid. You don't have to wear anything but it might hinder an escaping move through Westminster or Embankment if you don't.
I shall saunter along to Camden Town, adjourning to the World's End.
[widey] the only rule re-footware is that it must cover the whole foot... which leaves me with a move to St James' Park nipping to the Buckingham Arms for a dose of Waggle Dance.
since this is the first time I've ventured in 'ere, better play it safe... salsa to Shoreditch where the choice of shoes is endless (matching handbags available for many styles)