buy a cheap day return to watford/somewhere very close? Not sure from memory if the barriers at euston are platform specific actually, but usually any ticket will open any barriers, even oyster. Admittedly this plan may not be the best but if you've already got your tix for your trip on friday then you've not much to lose i suppose.
Again. Risky. It's so often down to the guard and if he's had his conjugals. Rare to see a lady handling this stuff but I suspect it would work out better
buy a cheap day return to watford/somewhere very close? Not sure from memory if the barriers at euston are platform specific actually, but usually any ticket will open any barriers, even oyster. Admittedly this plan may not be the best but if you've already got your tix for your trip on friday then you've not much to lose i suppose.