For me it can be considered confirmed, thewalrus proposed next Wednesday 10pm/ 22:00 GMT.
He didn't propose that specific time, he said that's when he has availability from, which I assume means from that day and time, his work schedule will be less hectic and will have more free time from that day onwards.
So since you said you are available at Wednesday 30th at 10pm GMT, we need to wait for TheWalrus to reply confirming that specific date and time.
Once he replies, I'll book it in
This should be a great set of matches!