There's a £750.00 deposit first then 23 months, then get another one or walk....
Comparing her indoor's Astra:
Road Tax = £230.00 (C1 = £20.00

Fuel based on 5500 miles = £1230.00 (C1 based on 7000 miles, assuming 52mpg, - I'd use it at weekends instead of the Volvo = £826.00)
Yearly service + MOT/repairs = £300.00 (C1 = £150.00? no MOT needed, might only need a 2-yearly service?)
Insewerance = £270.00 (C1 is group 2 so might only be £200.00?)
So already we're seeing savings of £834.00/year in running costs alone.
The Lease would cost £1628.00/year (less saving above) = £794.00/year or £66.00/month
If I've got my maths right she could get a new C1 for a net additional cost of £66.00/month
I might put this to her later, then post back tomorrow when she says no in a typical "how can you spend money to save money?" kinda way

What prompted this was the Astra MOT yesterday and basic oil change, and a new brake pipe (fail) all at a cost of £170.00. On top of this I know the Air Con has crapped out and needs a new conny/pipework so it's all looking kinda expensive soon.....