Pay off the debt... all of it... then start saving.
What percentage of your annual income is your £5.800 of debt? How much are your monthly repayments on that debt? having 3 months salary in savings is a comfortable place to be.... Once you have that - you can continue to pay the amount you have been paying in debt repayments, into a savings account.
EG: You borrowed £3,300 for the ensuite, based on a quick google search, you will have paid an additional £600 in interest if borrowed over 3 years, repaying at £110 per month.
If you put that £110 into your savings, you would have saved £3,300 in 2.5 years.
Decide what your priorities in your garden are - you can do them as you save - not all at once..
Let this be your Nana's legacy - that you always have money in the bank - never let your savings balance go below £1,000 - unless dire emergency like a replacement boiler. Reducing any loan by £1,000 will save you £250 in interest over 3 years and take you 12 months to put back in savings at £110 per month.
I save every month - it goes by standing order, into an account I do not access. Then when the car needs work, or I have to fix things in the house - the money is there.