Hey @nsmith1979 thanks for reaching out to us. I've checked your postcode but I'm unable to see any dates for when it'll be upgraded. It'll be worth to opt your number to receive text message updates on our Network Checker here. When they do the updates, you should receive a text notification to say that they're doing some work in your area.
Just an update to this, so I noticed the other day that when I click the 'Planned (3 months)' button on the 'Network Coverage Status' webpage the 5G coverage in my area greatly improves. I contacted Galliford TRY (who will be doing the install for Cornerstone) to see if a date had been fixed. They informed me that the site is 'ready for build' they're just wait for the instruction to commence. So hopefully it should be happing soon.