I will be staying near Camden Town Tube, and I want to visit London Dungeon, and get the 2FOR1 that the National Rail Offers.
I wonder I this plan will work:
1. Using https://www.daysoutguide.co.uk/2for1-london, get a promo code for 2FOR1.
2. Travel by tube from Camden Town Tube to St Pancras International rail station, buy there a single ticket to Farringdon rail station (3.4 GBP). just buying a ticket, not using it at all.
3. travel by tube from St Pancras to London Dungeon.
Total cost for 2: 33.4GBP (16.7GPB for a ticket instead of 27GBP)
Will my plan work?