Thanks all.

Well, I am on my way back from the stylist. He advised me not to go ahead with it because of the colour. He could colour my hair, but one can never be sure of the result and so it was a no-go.
This also mean it will be a no-go for me for a long, long time because I just took a long vacation off work to get this done which will now be forfeited, at least for this purpose.


The good news is the guy gave me a great haircut - best I had in years - and he said it looks better than a unit ever would.

And by the way, after talking with the stylist, it was confirmed that contrary to what some advised me here (including TL and Debbie), 65% density would be a big, big mistake in my case. 75% I got was the lowest matchable.


So back to square 1, or rather 1b - at least I now know my own hair can be styled to look decent. But I am 120 quid lighted for travel and the meeting.