Hi! Congrats on the big move! )
Don't know about removal insurance, haven't used one recently, but for travel insurance I have found a list of good companies, here it is - http://www.globespots.com/travelinsurance_uk.php
I recently travelled to Europe and used Globelink from this list, they were rather cheap and covered everything I needed, I think they do one way insurance. Hope this was helpful. Cheers! )