My younger son has a wife and 3yo twins none of whom travel light, and they are on their second Mondeo estate: lots of room and no major problems.

I'd suggest going for a 2.0TDCI (given the length of your commute) that's done 8,000 - 12,000 miles a year - not too many, not too few - and of course FSH.

Fords are better to drive than Vauxhalls and in general I think their reliability record is better. Look on the car-by-car reviews on this site for more information.

The Skoda Superb is the only real competitor for the Mondeo in terms of space: a good car but avoid one with DSG.

I have an 08 reg Mondeo 2.0 tdci estate. I travel 70 miles a day on motorway and country roads. It's a nice car, handles and drives OK and boot is massive. Car is quite wide which takes some getting used to. Overall I'm pleased with it. It on 171k now and no major mechanical drama. Needed new serpentine belt and power steering fluid needs changing every now and then but pretty good. I get 50- 55 mpg

The Mondeo is an excellent family barge, surprisingly fun to drive and limo levels of space. I had a 2.0TDCI (140bhp) for over 3 years and it was faultless.

If I remember right the cambelt service interval is 108K miles or 8 years, I would check before you buy. DPFs are robust and your usage pattern should be fine.

FWIW, don't expect super economy. It's a big heavy car, and the 2.0 PSA diesel isn't noted for being frugal. I averaged 42.5mpg in my ownership (genuine, measured at the pumps) although you'll probably exceed that as you generally do much longer journeys than I do.

Have you considered any other vehicles other than the Mondeo or Insignia?

As at your budget you can get a Hyundai i40, probably 11-12 plate with around 60,000 on the clock. They're a decent car and the 1.7 diesel engine is a pretty robust motor!