i have an...

unnatural obsession with busses in london... anyone who knows me will openly taunt me about this fact... I don't take the bus that often to work but on the off chance 'm going out after work then I'll take it. Any other weekend or evening travel I do in London is on the bus...I've got a pre-pay oyster card here which i just top up when it runs out... To my surprise when hunting about to confirm just why i was paying £1 in the morning and only £0.80 at night... and to my surprise I found that the max they will charge you per day on your Oyster card for ANY amount of journey's is £3. That is so news to me... why oh why oh why did i not know this!?!?!?