She'd do well to check whether she's still inside of a contract with Sky for the phone and broadband; have the phone agent confirm the new monthly price if she moves her line rental & broadband away from Sky.
Have you had a check of the telephone wiring in her house? For want of some tidying up she might be able to get a far better speed to the exchange? ...posting the full router stats might also be of help to see if there's mileage to be had from this step.
Finally, what kind of usage does she have? Is she a heavy user, or a light one? If she does do any heavy usage (such as downloading), would she mind doing this overnight? Or is her heavy usage down to skype, youtube, iplayer etc - stuff that's kinda time sensitive.
Assuming that she's paying the list price for phone (£12.25/mo from sky) and broadband (£17/mo for connect) I would imagine we can if nothing else find a better service for the same price
Was on Xilo C&W LLU on MRCEN, Now Be* on MRARD.