Does this layout exist

There's a new layout for 2020 from Compass that is very close to what you are describing, it can be seen in this video: https://www.youtube.com/watch?v=O26IeGlJhmQ

 

Our first caravan a crown was the same. We now have a six berth Sprite major 6 TD, which might be better for you when used as a four berth. Two fixed bunks and a dinette with table always set up at the back of the caravan for the children. There is also a sliding partition to block them off. Also has a power socket there for their tvs, consoles...

No front fixed double but the singles are long enough for adults and of course you can make a double up as well. A number of manufactures make the same configuration. I think it has won family caravan of the year with various magazines. We have used our for many happy holiday up to when the kids were older teenagers although now it's often just the two of us.

 

See https://www.youtube.com/watch?v=6N2A03PP-PA

We have the similar Sprite Major 6 that we use as a 4 berth for pretty much the same reasons - fixed bunks for the kids, side dinette with table always set up etc and it works really well for us. If I'm perfectly honest and in retrospect probably would have gone with the 6TD over the 6 because of the partition the TD has but it's a minor point.

If the OP hasn't already discounted these layouts for whatever reason then they are both definitely worth considering for anyone with a young family.

Scroll down this and I think there maybe a suitable layout

 

https://www.hobby-caravans.co.uk/de-luxe-edition/

 

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yes they are both great caravans and really good levels of kit. Now we are down to two, sometimes three, we are considering a fixed bed but certainly going for another Sprite.