The areas affected are Aberdeen (01224), Bradford (01274), Brighton (01273), Middlesbrough (01642) and Milton Keynes (01908). In these areas, the full number (including the area code) will have to be dialled - which will allow around 200,000 new numbers to be made available in these areas, which should satisfy demand for at least 10 years.
The change means the affected areas will use closing local dialling and will allow numbers starting with 0 to be issued i.e. for Aberdeen numbers will be able to be allocated like 01224 0XXXXX and 01224 1XXXXX. If the area code 01224 was not included there could be clashes with numbers starting with 0 or 1 such as 100 for operator assistance or 118xxx directory enquiry services.
The consultation closes on September 13th 2013 and the change is expected to come into force in October 2014.