Thanks tiagolvsantosbut that came back as record is unavailable.
I downloaded and imported the form query string parameter tool and generated a url which works great. I needed to add the customeridname and customeridtype for this to work correctly as below.
https://crm.domain/orgname/main.aspx?etn=incident&pagetype=entityrecord&extraqs=customerid%3D%7Bcc7eb67f-d63c-e311-8982-005056990038%7D%26customeridname%3DJoe%20Bloggs%26customeridtype%3Daccount
This tool is excellent, much recommended.
Thanks guys :)