BT Infinity deals pattern

Does anyone know if there is any sort of pattern for when/how long BT offers the deals on their Infinity packages?

There was one running until last night that was Infinity 1 Unlimited at £10 a month for the first twelve months and it has now stopped and gone back to 20/month.

Annoyingly today is the day my Sky contract has run out and my price with them increases, so I've missed out on the deal by a couple of hours.

I see that BT are almost like one of those furniture stores with never ending deals but I'm wondering if it is cycled every 1-2 weeks or something?

Try http://www.thinkbroadband.com/jump.html?type=5&url=h... £12.50 per month and £150 reward card That offer is new today

Don't forget to check the cashback deals for signing up via places like Topcashback, which currently gives new BT customers ~£115, covering most of the promotional price of Infinity 1/2 during the minimum 12 month contract.

ah perfect, thanks for that.