Ended up following @MORNE 's advise and using insulation tape at first - did about 4 layers. Then followed up with two - three layers of gorilla tape. This time when putting the tyre back on, I had to use soapy water as the fit was much tighter.
If I did not have the air compressor with me; there was no getting those tyres to seat. I first tried with just the floor pump and was back at the same result as before. Removing the valve core didn't help with just the floor pump. I then used the air compressor and it worked first time!
I had to do this! Once removing the core; the tyre was able to seat!
Once the tyre was seated, I deflated it, reinstalled the valve core and then removed a little bit of the tyre from the rim to pour in some sealant. Refitted the tyre and used the floor pump to pump them to 40 psi to sit over night after bouncing and spinning them around for the sealant to get everywhere
Now have two tubeless wheels with inflated tyres and sealant!
Thanks to all the help, much appreciated. I am going to try out the new tyres tomorrow and go for a ride!