Narrow backless booster suggestions please

[HahaHarrie]

I'm looking for a narrow backless booster seat to fit between two Britax isofix seats (one high back booster, one toddler carseat). There doesn't seem enough room to accommodate a regular size one in our Audi A4. Can anyone make a recommendation.

The booster seat is just for visiting children so won't be used for long journeys.

Many thanks.

Trunki booster is the narrowest one I found. The bumberbum is on paper narrower but how you use it beans the trunki is easier to use as well as being narrow

Thanks Jelly I will go investigate!

I tried a few from friends and then had to search the shops.The only one that fitted between my Brit ax seats was Halfords own make but heard on here that Tesco own brand prob would too.