Im currently in work About half the department are not in but hats off to two people here. Both cycled in, one from Worthing and the other from Newhaven (BTW I work at AMEX, Edward Street)
The real problem is that I need a member of management to sign my timesheet before 10am, otherwise I won't get paid this week. So, I will understandable be very annoyed if nobody materialises.
Phone the agency. Presuming they are even open themselves, explain and fax the timesheet over anyway. They will process it as normal, then you get it signed asap and fax the signed copy over. Any anomalies will be rectified next week.
I've had to do this once or twice in the past and it has been no problem