My boyfriend and I have arrived in London. We're Australians but embarrassingly enough I wasn't as organised as I thought, this resulted in us (apparently) receiving a 3 week 'visa' by the lady at border control. She said we had 3 weeks to leave, which works out perfectly because we want to leave in 3 weeks..... and one day :/ - on our passport she has given us a stamp and has written 6 months and has made no mention of the fact that she gave us only 3 weeks. (she has written no date whatsoever on it, other than '6 months')
1) Will it be put into the computer system that we must leave by a certain date? (even though the stamp says 6 months)
2) what sort of fine/punishment will we get for overstaying a day?
I would simply change our pre booked accommodation and leave a day early but we have a train to paris booked and I don't want to lose the money from rebooking.