Update!
We have life. Thought I would post a reply to say thank you to everyone who posted and to confirm I finally have somewhat of a desktop computer for the first time in over a decade! It was a thoroughly enjoyable experience to build and I was almost disappointed that the build was over when it was complete! Perhaps excluding the CPU power cables and nearby standoff screws which were notoriously fiddly!
I made quite a few changes around the 2 day sale. Mainly, the case, RAM and SSD. Eventually bagging an SN850 1tb drive, 32Gb of Ballistix 3600mhz C16 Ram and an H510 case (I think I might change this down the line)
I've managed to play a few games - Age of Empires, Fall Guys, GTA at low settings on the iGPU. The graphics aren't going to impress many but moving over to a desktop that can open games in the same time that it took to load up the old Xbox One is a great start for me. I'm sure a GPU will be making it's way in soon.
I have had a couple of BSODs but guess these could be down to drivers/installs settling ? Temps seems to be fairly constant at around 30-35 at idle and moving up to 50-60 when gaming on low. I also realised that I had plugged one of the case fans into the pump jumper on the board, this left the PC slightly louder than expected until I realised, the drop in fan noise was actually quite impressive.
Thanks again folks!