If you have to return your ESA50 over the coming weeks, please remember that 29/03/13 is Good Friday, and 01/04/13 is Easter Monday.
Royal Mail have also stated that on Saturday 30/03/13, there will be a National Postal Strike.
So make allowances for the above when posting your ESA50 to arrive at its destination by the deadline given.
www.gov.uk/bank-holidays Sending Documents to the DWP or ATOS bro58