After experimentation I found two techniques using bog standard tools. I like a challenge!
1: Got lucky on a mm perfect sized socket to drift out the outer race with the socket extension bar and hammer.
2: Reassembling the bearing only using 3 balls. It’s the minimum amount you can reassemble it with, and also a lot easier to reassemble.
-Stand wheel upright as normal, small amount of grease inside outer race to keep balls in place when fitted.
-Install 3 balls loose at the bottom of the race
-Insert inner race whilst holding in place
-Carefully push\rotate other two balls around the circumference so they are all equally spaced.
-Drift bearing out as normal 😀
It can be fiddly but it’s worked on different bearings on various places on the bike.