Rmc,
Winsford Flash is not in the EGCC zone. Its at the bottom end of the Low level route. Also Holmes Chapel is not inside the CTR, (since the CTR was changed) so if you are routing to the southern edge of Holmes Chapel there will be no problem. Obviously remaining below CAS. Best procedure is to Squawk 7366 (EGCC listening out frequency) and monitor 118.575 (EGCC Radar). If you need to enter CAS call up on that frequency. The EGCC new number is 0161 209 2836 if you prefer to call before hand.