Hi Doddsy,
You can try a different DNS to see if that helps
Changing DNS for Windows 10
1. Windows Logo
2. Type network
3. Select Network Status
4. Click on change adapter settings
5. Right Click on the adapter you use to connect to the Internet and select Properties
6. Left click on Internet Protocol Version 4
7. Click Properties
8. Enter the IP address for either Google DNS 8.8.8.8 or TPG DNS 203.12.160.35
Click OK and test again. If you are still having an issue then check for routing issues
regards
JayeshP9