herein because this is your first post.

You are up against the very much tighter insurance rules and regulations of recent times.

A few points:
"endorsement" is an emotive word in this context; for the Brits it means that you have a traffic violation recorded against your name/driving licence.
Literally recorded on our old paper based licences - nowadays all is kept on computer databases that can be accessed instantly by anyone authorised to see such data, which includes the insurance companies apparently.

But I do understand - you mean that your wife has not passed a test to ride a motorbike, in which case there is next to no chance of her obtaining insurance for a particular machine.
Even if she did manage to find an insurance company prepared to cover that type of risk, adding a foreign licence to insurance has proved to be difficult; but IIRC some folks say it has been done, in the past - perhaps not nowadays?
I suggest on that count you look at the Trip Paperwork area of the HUBB where someone may have explained how to do this.

Take a look in this thread - start with the latest posts for the most current information:-
http://www.horizonsunlimited.com/hub...cheap-34822-15

How about hiring a bike in the UK, depending on how long you want to ride here?
Or, consider buying a machine in Ireland, registering and and keeping it there, insured in your own name; there is plenty of information in here about how to do that quite easily.

Good luck!

__________________
Dave