Browser view changed to vBulletin mode

When viewing TG I'm being served the vBulletin view. I have had this happen in the past some while ago but I can't recall now how to reset it to the standard TG view. I have a screen shot but I can't attach it in this vBulletin mode. Help?

UPDATE: Needed to click the Full Site button (next to the Log-Out button) in the vBulletin served page. No idea why this occurred but all back to normal now :) So I can also now attach the screen grab.

Egg. I've just noticed under Profile > Activity, there is a link to change to vBulletin, perhaps yours will now say switch to TG view?

Thanks a lot for that Mick. I can't find that option but as I stated the problem has disappeared.