Probable General Election Timetable 6th May

The news media seem very certain that the Prime Minister will be going to the palace later today and asking the Queen to dissolve parliament next Monday, the 12th. That would mean that the timetable for the election after the 12th would be would be:
20 April

Last day for delivery of nomination papers /withdrawal of candidature/appointment of election agents (4pm)
Statement of persons nominated published at close of time for making objections to nomination papers (5pm on Day 6) or as soon afterwards as any objections are disposed of
Last day for requests for a new postal vote or to change or cancel an existing postal vote or proxy appointment (5pm)
Last day to apply to register to vote

27 April

Last day for new applications to vote by proxy (except for medical emergencies) (5pm)

4 May

Last day for appointment of polling and counting agents

6 May 2010

Polling Day (7am – 10pm) Last day to issue replacements for spoilt or lost postal ballot papers (5pm) Last day for new applications to vote by proxy on grounds of a medical emergency (5pm) Last day to make alterations to the register to correct a clerical error or to implement a court registration appeal) decision (9pm)

I understand from the Electoral Commission survey on the matter that Sheffield intends to count after the polls close on the evening of the 6th/early hours of the 7th.