I fixed my iPad just now by first backing up all data, resetting the iPad, erasing all data. I then set up the iPad as a "new iPad" and synced my photos and music using icloud (I didn't do a restore from the back up in icloud) and re-entered all of my email accounts, which in turn updated all of my contacts. I then took this as an opportunity to cull the number of apps on my ipad (I really had too many anyway!) and free up some memory - I then only downloaded the apps (from the App Store) that I use frequently, and left Booking.com off the list for now, even if it is fixed ( I do not want to go through this pain again). This is a painful way to solve the problem because you have to re-input all of your passwords for all of your apps and email again, but you do end up with an iPad that works, just like new - safari is now working perfectly and so are all of my hyperlinks in mail. This was my last resort solution after trying all of the fixes mentioned above multiple times for four hours last night without achieving the desired result.