Outside of the Commandery in Worcester, I wasn't looking for any particular sites related to the ECW theme. As it turns out, I kept stumbling across them. On the walkway up the sandstone hill on which Nottingham Castle rests, one can find a marker dedicated to King Charles' attempt to rally Royalist support (see picture to the right).
Dan F of Wargames Illustrated advised me that Nottingham was a Parliamentarian stronghold and that "approximately three men" joined Charles.
Set into the side of the sandstone hill is the pub Ye Olde Trip to Jerusalem, which claims to be the oldest pub in all England. Nice sandwiches and beer - the staff was nice too. Maybe the three Royalist recruits had a pint there before embarking with the king.