I'm a bit grumpy :(
I ordered this: https://www.island-4x4.co.uk/advanced_search_result.php?keywords=ANR4687G+&x=0&y=0
and got this: https://www.island-4x4.co.uk/rear-height-sensor-9702-britpart-anr4687-sold-with-warranty-p-35227.html

I'm not very pleased with Island - especially as the part I got is marked "Sold with no warranty" across the top of the page!

Harumph :(

I ordered one and it came in a britpart box but had a dunlop marking on it.

Hmm, it does indeed have Dunlop on the rubber gaitor bit... but is that enough?

Did they charge you for the OEM Dunlop one? If so some-one mucked up and put wrong one in your box so get on to Island and ask for the wright one.
I'm surprised that they would be happy selling such sensors without warranty. Especially as the price difference relative to OEM is so small.

Saying that there is huge variation in price between suppliers. Most seem to want more for Britpart than OEM let alone a better aftermarket brand. Island price for OEM is very good.

Clive

Mine had a dunlop marking on the body just below where the arm enters. I recall seeing somewhere (maybe on the island site) that it comes in a britpart box but I can't seem to find it anymore.

The air springs are made by Dunlop but come in Britpart boxes. I assume that's because Britpart are prepared to buy them in the sort of quantities in which Dunlop are prepared to sell them.

Stand Down! :)
jacckk is right - there's a Dunlop arrow on the main body of the part. My eyes are getting old but it's visible. I guess I'll soon be underneath the Duchess again...

As Gordon says. Britpart will supply their own cheapo stuff or decent stuff that they buy in so they can offer as many parts as possible. Most of the Dunlop EAS parts come via Britpart, presumably Dunlop don't want to have to supply numerous retailers when they can supply the one wholesaler.