If you have Sky Digital, go to the Services menu
Then press 4 for System setup
then 4 again for "Add Channels"
Then using the remote change the settings to the following
10.788
V
22.0
5/6
Then select "Find Channels"
Eventually a list will come up..
use the arrows to highlight BBC1 Yorks&Lincs, and press Yellow to store it, then press select
Backup to the service menu, then select "6 - Other Channels", then press select over BBC! Yorks&Lincs
This doesnt 'write over' any of your regional settings by the way, it just allows you to view other regions
