Any advice on the best way to achieve this??

Diagram would help, in terms of configuring hex..... this reference is spot on for vlans.
viewtopic.php?f=13&t=143620

Bridging means the two subnets would become one: one ip range. Is that what you want?
Or do you meant to route traffic between these two vlans?

Yes intervlan routing would work. can I do this on the hex.

Does anyone have a script for this??

Two elements needed:
* ensure that router on each end knows where/how to forward traffic for the "other end"
* ensure that forward is allowed in /ip firewall filter chain=forward ...

can i do this with just one router??

anyone have a firewall script??

can i do this with just one router??

possibaly yes, if you can physcally have the hex router at the same location Aruba switch. so that network 1 is plugged in one port and network 2 is plugged in another. this way the hex will handle the inter-vlan routing.

or if you have a router uplink from the Aruba switch, this router can also do the inter-vlan routing. but your existing topology may not work with these changes. Again, a netowrk diagram would save us from guessing.