jmg, it is www.meetic.co.uk.
(I cant test this, because dating sites are banned by my work!)
Re the many children thing, I am reconciled to minibuses, as Ive got 4. But, you need a special licence to drive anything with more than 8 seats. So, you + 3 children + future wife...that means you've got to go for someone with 3 children or less, or a bus drivers license!
Anyway, as a single dad you've got access to the biggest dating agency on the internet - AuPairWorld.net!
there are loads of very nice, serious girls on there. But they are not the ones who post the honeypot photos IME...