Finally got Mrs F sorted with this -
https://www.evanscycles.com/saracen-tuf ... e-EV240060
Seemed like a reasonable price plus my work has a reward scheme thing that allows us to get cash back and discounts on store cards and vouchers in a number of high street stores, which got us a further 10% off. So all in £200 for the bike and a natty little helmet too.
First test drive was on Sunday led by Cameron around Linlithgow Loch - and whilst Kellie remains the most reluctant cyclist on earth - we have a wee boy who is both convinced and delighted he taught Mummy how to cycle (and whether she admits it or not - she did have a lot of fun along the way)
Can thoroughly recommend the bike as a starter if anyone is looking - 13.5Kg so easily manageable, gears shift slickly and easy to ride.
Thanks again to everyone for their advice (especially that to try the bike first of possible) - we managed to get a seat on it in Evans Glasgow at Braehead - definitely made sense.
Cheers
Alistair