Wow! What a fantastic improvement there is so far and wanted to share in case it helps anyone else. Also thanks to the members in here who gave me advice.
I’ve increased my gabapentin to 1500mg (600mg at 6pm/600mg at 8pm/300mg at10pm) and one 30 mg dihydrocodeine with the 10pm dose.
Now getting to sleep easily and only waking once or twice. The later I wake I sometimes have the legs start but can mange to get back to sleep pretty quickly.
Compared to previously being up 3-4 times a night and then being up for ages each time this is such a good improvement!
The side effects seem minimal and the only negative is I’m woozy in the evening so can’t drive.
Spoke to my GP and he’s been supportive so far. It’s useful quoting the NICE CKS information which is more up to date (as well as the updated Mayo clinic algorithm as in the UK they like to follow UK information.)
Can’t seem to post a link but it’s cks.nice.org.uk and search restless legs syndrome.
Hope this helps someone else and thanks again folks!