I love these bridges that you find apparently in the middle of nowhere. This one has a definite bounce to it tho' ... :)
Once you're done here ,,, and heading towards No:7, just walk almost straight towards the cache on your GPS. The footpath can tend to disappear a bit, but you're on the right track - and half way between No: 6 & 7 you'll come across a tree - again, it's not obvious, but the footpath goes right by it. You may have to push some branches out of the way to find your track again. When I placed this, in mid June, I had to walk thru a field of 4ft high Fava Bean plants... well, I 'think' that's what they are,,,Black & white flowers? This is still a Public Right of Way,,,, called the 'Mepal Way' footpath.
If you wish, you can park at the end of NEW ROAD and walk this bit in reverse. The WP I've included is approx 500ft from No:7.