Assuming say 10% pension contribution, 26k equates to what, £1700 a month net? From this deduct rent,council tax, food, utilities, travel/transport, debt servicing, phone/internet, clothing, insurance policies, savings….
It might be ok if you’re young free and single I suppose but there won’t be much left in the pot. Certainly not enough if you have dependents I shouldn’t think, unless you qualify for benefits.