Hi Ellie and welcome to the forum,
5k by anybody’s standards is a sizable deposit, however, unfortunately as you are in an IVA a 5k deposit is 10% of 50k and only 15% of 16.6k - I am not sure what amount you are looking to borrow, but I'm sure it's probably more than that.
To obtain a mortgage whilst in an IVA you would need the permission of your IP/Creditors, have carried out your IVA satisfactorily & a 10-15% deposit. To obtain a 90% mortgage product you would need a fairly decent credit score.
That said, the procedure is to go through a fact find with a mortgage broker, who will, after carrying out a credit search, search the market for you and hopefully find a mortgage product that meets your needs, wants and circumstances. The rate you could obtain would depend on your personal circumstances and each case is taken on its own merits.
Hope this helps
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