Hi all, got an update on this (sorry I've not been able to log on sooner to mention it) and thanks so everyone for their advice.
It turns out on the day of the appointment, I did get a postponement email from them a few hours prior to my appointment. It's just I rarely get a chance to check my personal emails during my working day. So technically they did let me know, it was just short notice.
First time trying to get a prescription for this and the reason for the postponement was my
GP being slow in getting the summary of care report over to them. Even when they did, it didn't have much stuff on it so spoke with a nurse at Dispensed who was really nice and friendly and professional and helped explain about the process.
Should be getting my consultation next week now and will keep everyone posted as I'm sure people are keen to learn more about a relatively new clinic in this country.