If you are in the UK and hosting in the UK then definitely redirect .net to .com. At a later date you may find it beneficial for the .co.uk to stand on it own.
Google seems to have a bit of a problem with UK hosted .coms, well, they do mine anyway. I used to redirect my .co.uk to my .com however this past couple of years Google has mostly removed most of that content from Google.co.uk therefore I uploaded the same site to my .co.uk and now Google.co.uk is normally showing those results.
I am not saying this is the same for everyone however I have had to do this with several other formerly .com sites and place them on .co.uk domains.
I have no idea what would happen it if you did this from the very beginning.
Thanks for the welcome. I'm based in UK. Some domains with crazy domains but long story there (UK or Aussie based?). More recently Dynadot and their hosting (US), all seems to integrate extremely well with them. I do have some domains that will be better suited to the UK for specific products like "narrowboat holidays" but thought the search engines would prefer the .com every time? Will need to think it through.
Hi there, I would say this is more a general discussion and not purely about Adsense. It just wouldn't work well with Adsense, it will affect you in general.
Why? because having you content on 3 domains will mean duplicate content and will not perform good, even if the content is good. Research around this forum about duplicate content. Besides, your readers will be confused.
I had an important site (still have it) that surely the domains would have been bought by somebody else due to the content and name. So I bought other domains but I added special pages with little content and a big note regarding the best content being on the "mother ship-site".