We're in a 2-bed house, but no kids and mortgage paid off.
Energy costs: £60
Council tax £158 (over 12 months)
Mobiles £18
Water £36
Car tax and insurance (inc breakdown cover £19 (paid annually)
Bulildings & contents insurance £18
Internet/landline + BT Sport £60 (soon to go down to £28 when we switch to Plusnet)
No prescription costs or life insurance as we both have cover with work.
Where we have significant savings over you, OP, seem to be mobile phones and Virgin Media. I have a Samsung on contract for £13 a month and will go SIM only as soon as the phone is paid for. DP is a Luddite and has a PAYG phone that he tops up with around £5 a month!
Plusnet is cheap, around £21 (and reliable, according to reviews) and I would regard Virgin Media as a luxury, so would bin this off and have Netflix if you don't find enough to watch on mainstream tv. That could save you £100 a month.
We don't have pet insurance, I used to put £10 a month in a separate account for vet bills, and it still has a few hundred in it. We've been very lucky with our dogs' health over the years though.
I'm far from convinced that £28 a month for heating & plumbing cover is good value (we go years without a bill, and DP can fix basic things), but I can see that the peace of mind and the knowledge that you'll get things fixed quickly may well be priceless. We recently spent 10 days using electric heaters because we couldn't get a plumber any quicker!