I don´t think that would be really a satisfying solution for you. Also if you do all this effort I wouldn´t do a half thing and make it without the bed extension.

That are exactly the reasons why I searched for about half a year to find a suitable Fun model for me. If standing room is important for you then you need a push-up roof anyway, which automatically would mean you don´t need to worry about the bed "downstairs" any more!

I noticed the back shelf was missing, buy my intention is to slide the seats forward up to the captain chairs to give a full length :)

I also crave a factory solution rather than a DIY one, I have slight Obsessive Compulsive Disorder so if its not perfect I will never be happy :D

The roof conversion was something I looked into but a Reimo roof is 3,000 Euros in the UK plus fitting and bed.. And my insurance would need to be modified to take into account the extra 'value'..

I WISH WISH WISH the Viano FUN Westfalia was available in the UK :D

True, the rear shelf/bed extension would be nice but at the same time that is one component that would be easy to build DIY to a good standard :)

As I just mentioned I'd love the roof but its seriously expensive and imposes insurance issues.

Yeah, but if you buy a LHD Viano, transfer it to the UK, exchange the interieur and sell it back to the continent this may also lead to some expenses (insurance, ferry/train fee, loss of value - depending on how good a seller you are). And on the other hand the additional comfort you get in my opinion is only marginal, while a push-up roof gives your car indeed real more value. For example if you look for used Vianos with push-up roofs you will notice, that usual they are exactly 5,000 € more expensive than without. Means the roof is an investment that will not loose its value, while I am sure the additional costs fo insurance may be lass than the gain of comfort.

Well, then I am not sure whether such a half "factory" solution can really satisfy you. "Factory solutions "do not always fulfill your expectations.

I would merely registered it in the UK, sit on it for a bit then sell it to someone who's leaving the UK to return to the EU :)

The aftermarket roof would increase the value of the Viano ever so slightly but not as much as the difference would be on a factory built one :(

Just as a quick fact check: I did not find any Viano offers with "aftermarket" roofs, but a quick search on mobile.de gives the following overview:

Viano 2.2 from 2004/05, ca. 200,000 km
with push-up roof: ca. 17,000 to 18,000 € (2 offers)
without roof: majority of offers between 9,000 to 12,000 €
Price difference: 5,000 to 8,000 €

Viano 2,2 from 2006, 150,000 km
with roof: 27,000 € (1 offer)
without roof (only long "Fun" models): from 13,500 to 21,900 €
Price difference: 5,000 to 13,000 €

Also just for comparison the same with VW T5 models, as here you have usually a lot of cars with "aftermarket" roofs:

VW T5 Transporter (so no "factory roofs"): 2007 - 2009, 60,000 - 100,000 km, 100 hp:
with roof: 20,000 to 21,000 €
without roof: from 13,000 € to 17,000 €
Price difference: 4,000 to 7,000 €

VW T4 Multivan, 2000 to 2002, over 200,000 km:
with roof: 12,900 to 20,900 €
one offer with Reimo roof: 15,000 €)
without roof: 10,000 to ca. 17,500 €
Price difference: 3,000 to 4,000 €

Fazit: The "Multivan/Fun"-like models (= with roof but without kitchen etc.) are rare to get, which to my experience means, that they tend to keep their value more than the standard models. But of course I don´t know about the specilities of the British market.

People in the UK aren't really that aware of the whole 'day van' thing.. To the UK market a camper is a van with a bed, cooker and sink :)

You are very lucky in Germany!

Well, I thought the Brits are open minded towards such kind of stuff

And don´t think I don´t have to defend the "Fun" concept against the mainstream opinion here as well... .box.