It depends which country you visit first. If it's the UK then you can travel south of the border afterwards with only the UK visa. Weirdly If you enter Ireland first and then go to the uk you will need both an Irish Visa and a uk visa
I received mine in 12 minutes!! Couldn't believe it. Well pleased. I was told at immigration that the first 90 day report after receiving my marriage visa had to be done in person, after that online is fine
I've used the 400k for the past two years and I bring over more than 40k a month using wise for living cost and my sons education. I'll still have the 400k this time around but will also bring evidence of monthly transfers over the 40k and see what immigration say