Google has indexed m.freedomltd.com/hen-nights/party-locations/london//cocktail-training/ missing a folder.

[henandstag]

The non-existant page m.freedomltd.com/hen-nights/party-locations/london//cocktail-training/ is firing the page m.freedomltd.com/hen-nights/party-locations/london/ and so giving a 200. You will notice the // is missing the folder activities.

It does not return a 404 error.

My developer has responded as follows "Nothing you can do, as I’m not sure I can do anything about that either without a serious relook at the rewrite rules."

How can I get Google to de-index the wrong page and re-index as:
m.freedomltd.com/hen-nights/party-locations/london/activities/cocktail-training/

[Ray-pp]

Why not just implement a 301 redirect to tell Google that the page has been permanently moved to the new URL (the one with activities)? Then the page will auto redirect the user and Google will recognize the correct page as needed.

[henandstag]

It would be about 8000 x 301 redirects because we have hundreds of activities and locations. They are all affected.

[Travis_Bailey]

I'm not terribly well-versed in IIS environments, but it sounds like your developer is speaking the truth/correct. Considering it's happening on the mobile version, and not the desktop, there's another hint in favor of a bad rewrite. So as mentioned above, set up a temporary redirect until the rewrite rule is fixed.

Also, it appears that the mobile and desktop URL serve significantly different content. That's generally something I would avoid. Mobile users want the same stuff as desktop users. So that's something else to think about.

[GPainter]

Ouch! You would need to get some sort of code other than 200 to fire a 404 or 301 would be best as you can direct users, you can also try to block those URLs via robots i suppose, and the third option you can try depending on what you can do is a rel=canonical link pointing towards the correct page which would help all seems a bit manual though might be worth seeing if there is a longer term solution.

in an ideal world a 301 would be perfect (or at a min rel=canonical tag).