New to me which way round the M25 from Kent to Chilton Rd Chesham any hazards 14ft trailer any info would help thanks.
I’d suggest coming off at the A41 Aylesbury junction with M25, then off down the A416 which takes you into Chesham. At the bottom of the hill as you come into Chesham (watch out for the 30mph speed camera) turn right at the roundabout next to the petrol station and then immediately left. That’s Chilton Road - light industrial estate at the end.
I can’t think of any bridges or obstructions to concern you, but don’t take my word for it - check a trucker’s map or truck aware satnav.
It’s pretty well opposite Kent so I doubt either way round makes much difference.
The roads around there really get on my Chalfonts. 
Was thinking easy route M25 (clockwise), M40 exit J2, head north to Amersham then join the A416 onto Chesham ,A416 which takes you into Chesham. then follow as ORK has posted -
“At the bottom of the hill as you come into Chesham turn right at the roundabout next to the petrol station and then immediately left. That’s Chilton Road - light industrial estate at the end.”
I know there are a couple of lowish bridges on both routes so had a quick check on GMaps and where you cross the railway lines it’s 14’3 on my route and 14’9 on his, so either way at your height you’ll be fine.