Two players at Notting Hill Gate was my secret goal. That gives me a bonus turn.
I'm opening the second marzipan. The new code is 4405. I've luckily actually seen this track before, so I know correct response. I'm playing GENERALISSIMO down the Hammersmith and City line hitting the triple word score at Edgware Road. That gives me 396 points, which I'll immediately cash in to prevent all westward travel without a DC 16 dexterity check for the next five turns.
For my second turn, I'm opening a third marzipan. 3339 is the code. I've never seen this one, so I'm taking the safe route and taking the circle line clockwise to Liverpool Street, leaving me with £6.50 to play the gachapon there twice. I'm not going to open the capsules until another portal opens.
As both of these turns count toward the Bank Holiday timer, only one turn remains before the banks reopen. Thank goodness.