If you're looking to search for sites with a specific postcode on Sourcing:
1. Open the 'Sourcing' tool and choose an opportunity
2. Click 'Add filter' and select 'Title address'
3. Click the variable 'contains', type the postcode you wish to search for and click 'Apply'
4. Make sure you choose a search area from the bar at the top of the map
5. Once opportunities are found, click 'Browse Opportunities' to see the results.