Hi, just thought I'd chip in!
OH and I were discussing this last night.....with M & S due to sell off their financial services as part of their 'survival package' we debated the risk of taking out M & S cover, only to find the premiums increased/cover changed in a year or so.
The problem is, if we claim under the M & S policy, and then need to change, Molo then won't be covered for any pre-existing conditions - so we decided that under the circumstances we may be better off giving M & S a miss, despite the competitive rate at the moment.
IMHO, the less well known insurers seem to offer a better deal though....Pet Plan is almost double some of the other quotes I have obtained.