Thanks for the responses.
Home: 11ms Ping 543.26mbps Down / 34.80mbps Up
Work: 3ms Ping 841.29mbps Down / 939.08mbps Up
So; latency is awesome at work and quite decent at home.
Yes I upload from the work PC to home at over 30MB/s consistently through ZeroTier although I have seen it higher - even 50MB/s which is almost capping my Home download.
When using our SonicWall SMA (Secure Mobile Access) Device to connect to office using NetExtender the maximum I get while copying to a UNC Share is about 3MB/s. It also takes quite a while before it can even starts transferring.
The SMA uses SSL for the VPN I think so clearly your encryption is better for performance with regard to SMB shares.
As you say maybe it’s the compression as well.
Thanks guys anyway 