Thats better news, i have budgeted for 30mpg ~£50 week. Each way is 32miles with ~12 miles B roads and 20miles dual carriage way, so i am hoping ~35mpg.
I don't think you'll achieve 35 mpg, unless you take it really steady
One of my standard journeys was my house to our Manchester office, 50 miles probably 45plus of those on motorways although I would hit slow moving traffic for a bit on the motorway.
Managed 30ish on that trip. Due to traffic that wasn't booting it either.
Not sure what a tank of petrol on the Cupra costs nowadays but it lasts around 300 miles, at the peak a tank of od V-Power was £60ish I think, maybe as much as £65.
Remember to price it on 98RON+ petrol as you can lose mpg on lower RON fuel.
The Cupra is a so so really fuel wise, not as bad as a Focus ST but not economical either. You can't achieve the quoted figures.