thats bad

could be a mixture of a few things

MAF sensor
plugs
oil
air filter
lambda sensor
incorrect tyre pressures

or with that sort of consumption you may have a fuel leak somewhere and it's weeping fuel out as your driving, does the car smell of fuel anywhere or when driving?.

tbh i'd like to see ATLEAST 130-150 miles from £20 maybe less with just town driving

i get around 230 miles from £35 two blokes in the car with tools with a mixture of m40 and london rush hour traffic