Dam, hopefully it will come at some point.

Thanks for looking. If it does I'll update here.

I have had a response on the AMPLIFI forum and it does appear like it's supported

I believe you select DHCP and enter you HEX value in to the DHCP Client ID text field directly underneath the drop down

However when I try this it doesn't get an IP.

I'm not being thick and I. Was plugging the AMPLIFI directly into the openreach ONT box.

The hex value that you input, does that otherwise transcribe to and follow the ascii format that Sky are expecting for the ID field?

I was just taking a username and password in this format and converting it to HEX format:

kingbiscit124@skydsl|abcd1234

Did you include the ‘pipe’ character (think it’s 7C in hex)?

Does it possibly require an Option 60 string being set too?
https://docs.opnsense.org/manual/how-tos/SkyUK.html

Yes included the pipe.

Will give the option 60 string a go tonight. worth a try.

Can you possibly screenshot how you are entering these lease options?

I will do this when I get home tonight. Thanks for your help I really appreciate it. Seems daft having an extra device being powered 24 hours a day if its not needed.

In reply to a post by Pheasant:

Can you possibly screenshot how you are entering these lease options?

Finally managed to do this. Kids were getting annoyed with me keep messing so waited until they were at school.

I tried both:

12345678@skydsl|12345678

313233343536373840736b7964736c7c3132333435363738

and

dhcp-client-identifier “12345678@skydsl|12345678”,dhcp-class-identifier “7.16a4N_UNI|PCBAFAST2504Nv1.0”

646863702d636c69656e742d6964656e74696669657220201c313233343536373840736b7964736c7c3132333435363738201d2c646863702d636c6173732d6964656e74696669657220201c372e313661344e5f554e497c5043424146415354323530344e76312e30201d

Putting the HEX value in the DHCP client id e.g.

https://ibb.co/VTpXmgn

and

https://ibb.co/1b9sb0q

Finally got it working. I read on another forum that SKY can take upto 5 mins to recognise a different router.

I used a HASH of

12345678@skydsl|12345678

e.g.

313233343536373840736b7964736c7c3132333435363738

Waited 5 mins still didn't work, I then restarted the Amplifi and it kicked in!

Thanks for all your help everyone especially @Pheasant