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My client's company has just acquired another company in the same industry and with that acquisition came two websites; companyname.com and companyname.co.uk. companyname.com has PA13 and DA10, companyname.co.uk has PA15 and DA10. At the moment, the two companies are to be run as separate companies but will become fully merged in time. My client's own website is brand new  (PA1  and DA) and I'm wondering what is the best way to use these other two sites to improve my client's search ranking. Should I use the two sites to link to my client (these would be logical and natural links e.g. explaining the acquisition, under new management) or would it simply be better to redirect the domains to the new site? Many thanks