Travel taxability

[moorfield]

Given that historical information would you not think that week 53 will also be 1?

I don't think the historical pattern necessarily implies the future pattern.
If I'm going by my written contract then I say I don't know if I'll be working for my client next week regardless of it's end date. Admittedly this is unlikely but if I was working for a small hedge fund that 1yr 51 weeks ago was saying "don't worry we've got more money in the budget than we know what to do with - credit crunch? - not in a million years" I would certainly be thinking this now.