Parliamentary Voting System and Constituencies Bill

I dread dragging the debate on any longer than is necessary, but in Burnley at the election in May we had one ballot box for both the local election ballot papers and the general election ballot papers. It caused no trouble whatever. If we had two boxes, the reconciliation of the ballot papers in either box would require them all to be emptied out, because people will make mistakes. I can see no sense in having various ballot boxes. The present system has worked for years. Why change it now?