Why on earth you'd want to would be one of the first that comes to my mind.
Zen are a pretty decent ISP, Sky - whilst not totally abysmal, certainly are not in the same league.
I've had Sky for 3 years, my line syncs at 20meg, it very rarely drops and I always get full speed from it.
Bargain for £10 a month
Just make sure u can get on Sky's network, not the connect product
Why on earth you'd want to would be one of the first that comes to my mind.
Zen are a pretty decent ISP, Sky - whilst not totally abysmal, certainly are not in the same league.
30 day Broadband and Talk Satisfaction Guarantee: You can cancel your Sky Broadband and Talk services at any time within the first 30 days of all your services being activated.
Sky LLU is fairly decent, but getting interleaving turned off can be a bit of a chore, requires pestering support until you get through to the right person.
40Ms latency is a bit pants imo, I get 15ms to just about anywhere in the UK that has decent peering.
Worth bearing in mind that if you did leave you'll probably get charged by Zen to reconnect from an LLU provider. You also won't get any of the niceties such as a block of public IP's (let alone even a single static one) or rDNS from Sky. So worth considering if you require any of that before you make the switch.