2 bedroom wanted

I’m looking for a 2 bedroom flat/house preferably in Acton, London. Would like to move ASAP and for a long term (minimum 2 years). I work full time and my annual income is 25K. I’m currently on maternity leave and get partial housing benefit. I’ve never missed a payment before either rent, bills or credit cards payments. However, I’m finding it very hard to find DSS accepted properties in my area. Is there any tips or advise on how to approach potential landlords