If the Disability Scheme in work is an Income Protection policy coming into effect after 26 weeks, three things come to my mind...
(1) In many cases where an employer is providing an Income Protection scheme, it's tailored to come into play after they stop paying you, which I think is the question Rainy Day is getting at. You may find that your employer will pay you for six months and then the Income Protection kicks in.
(2) Even if it doesn't, you only need to build up a "Rainy Day"

savings fund to tide you over for the period between when your employer stops paying you and 26 weeks when the Income Protection scheme kicks in.
(3) Check the terms and conditions of your employer's Income Protection scheme. You may find that it only covers a percentage of your basic salary or a percentage of your pensionable salary, either of which may be lower than your actual earnings (particularly if you earn bonuses, commission, overtime etc.) If so, it might be worth your while investigating a "top-up" Income Protection policy to bridge the gap.
You don't mention if your wife is in paid employment or whether or not she has Income Protection in her place of work.
Liam D Ferguson
www.ferga.com