Thanks for the continued support. I think I may have found the cause of the issue. The MTU at site 1 was set to 1400 still from when we dabbled with the static IP service. Site 2 was correctly set to 1500. On changing this, everything seems alright so far...
Think Broadband monitoring is underway anyway and here's the last day. I think everything looks fine.
Site 1:
Site 2:
