Readings requested after 1300 GMT on 22 December 2013 will be invoiced for on 27 December.
I had hoped to fit them in today and tomorrow, but I cannot. Apologies.

Readings requested after 1300 GMT on 22 December 2013 will be invoiced for on 27 December.
I had hoped to fit them in today and tomorrow, but I cannot. Apologies.