Yes that would certainly help.

you could also duplcate the sites, one on a .com and the other on a .co.uk, you will not have to worriy about duplicate content when on different TLDS.

See matt cutts video
http://www.youtube.com/watch?v=Ets7nHOV1Yo

change curency and date formats to match

Yes but then its hard to get the quality links for each, you can do your local directories for each, but the quality links is a bit harder.

It is hard to rank for multiple servies, but even harder for multi locations, but you seem to be doing the write thing, make a page for each target.

You probably have a US ip number, you generaly rank for the location of your web site.

you can have a look at this google post on the subject may help

http://googlewebmastercentral.blogspot.com/2011/12/new-markup-for-multilingual-content.html