Yah, thats the bike, its locked up outside the office, I'll check the tyre markings at lunch.
Not sure what it weighs - its easy enough to carry though - I cycle over tower bridge, then have to carry it down the stairs on the north side, its not too bad.
And I went and had a puncture last night, I need a decent rear tyre and inner tube, not the cheapo nasty Halfords crud.