Let's not say London because you can certainly take NT there, say a nasty country. Let's see, you violated the license while there, but the copyright holder orally waived his right to sue for copyright infringement, effectively giving you license after the fact. You're safe.
This license after the fact thing is done all the time by Microsoft. Your company is caught without enough licenses, so Microsoft says it's all good as long as you sign up for a nice long Software Assurance contract that includes licenses and upgrades.
No, what he waived was his right to revoke my license. Big difference.