Prednisolone

One thing I would do is take the taper very slowly, considering how long you've been on steroids for. If you are on 5mg I would go down to 2.5mg before coming off them altogether. (There are 2.5mg Prednisolone tablets available.) Another possibility is to up the dose of your maintenance med or move over to Entocort (another steroid, but one which acts locally on the intestines rather than body-wide). Hopefully, one way or another, you can come off the Pred without triggering another flare-up.