I buy the tesco discount brands frozen mixed fruit, which is yummy and is currently only a £1 a bag!
I buy Asda frozen raspberries, blueberries, cherries and mango. I separate them into little food bags and then freeze them individually. I normally have mine defrosted with a mullerlite yoghurt over the top and a little sweetner.
Tesco currently has 500g bags of Country Store mixed frozen fruit (blackberries, cherries, strawberries, raspberries, redcurrants & blackcurrants) on offer for #1, usually #1.29