Even more so if you cancel altogether.
My TV, phone & broadband was £160 after my offers had expired. I rang up last week and they offered me a £30 discount so I cancelled everything apart from the broadband.
If previous cancellations are anything to go by I'm expecting at least 3 or 4 better offers before the month's notice runs out.
If not, sod them, I've got a dodgy box ?