Thanks again for your response. I'll get on to our network team to see if we can work out a solution where server admins can have operator access on the BigIPs. Not sure this is going to get very far but I will try. The network teams are actually our client (large Telco) and I don't have a lot of confidence that they will approve any form of access for the server admins. No harm in aksing though.
Failing this it looks like I will have to look at disabling RDP access on the servers for our maintenance window. Not the most elegant soulution but it will work.
Thanks for your help!