I think NTL normally only offer the 9 month contract during september and october, but you could still try to get one.
If you are forced into a longer contract than you want then signup for the minimum package on each of the services (tv, phone and broadband) and then ask them to be upgraded. Because you have the kit already and ntl only need to change the settings you only need to stay on the higher package for 30 days. The only thing to beware of if you do that is that a the pace STBs will not support more than 1Gbps internet (ntl's new basic package), so make sure you get a samsung if you're going to upgrade to a higher speed.