Did you just stumble upon a file that is digitally signed by London Jamocha Community CIC? If that's the case, please read on.
You will probably see London Jamocha Community CIC when running the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can also view the London Jamocha Community CIC certificate with the following procedure:
Here is a screenshot of a file digitally signed by London Jamocha Community CIC:

As you can see in the screenshot above, Windows states that "This digital signature is OK". This means that the file has been published by London Jamocha Community CIC and that no one has tampered with the file.
If you click the View Certificate button shown in the screenshot above, you can view all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, and so on. You can also see the address for London Jamocha Community CIC, such as the street name, city and country.
DigiCert SHA2 Assured ID Code Signing CA has issued the London Jamocha Community CIC certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the London Jamocha Community CIC files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/73 | javaw.exe |
| 0/70 | jli (2020_07_11 00_30_11 UTC).dll |
| 0/68 | javaw.exe |
The detection percentage is based on that I've gathered 211 scan results for the London Jamocha Community CIC files. 0 of these scan results came up with some sort of detection. If you like, you can view the full details of the scan results by examining the files listed above.
The analysis is based on certificates with the following serial numbers: