Hey Alan,
Thanks loads for the advice there. Makes a lot of sense.
Problem I have is we do not have any kind of access to the old site. Nor the client having a good relationship with the agency who made the previous site.
I have run multiple crawls of the old site with Screaming Frog and Moz and I just cant get all the properties spidered. Out of the total amount of properties I have about one third of them, which of course can be redirected.
We made a final change to the url structure so the property address is added. The urls now look like the following -
OLD - domainname.com/property/view?property=14863
NEW - domainname.com/property/street-name-postcode/propertyid
The main problem we have and why I think it is not possible using mod rewrite, is the property ids are different on both sites. There is really nothing in common between the two URLs at all aside from /property/ and page title.
Any further advice would be very much appreciated Alan as its clear you have done jobs like this before.
Thanks,
Mark