One last walk in the Misbourne Valley, this time starting from Old Amersham. If last week's predominant colours were green and blue, this week yellow and red are starting to appear...a hint that Summer is reaching its height. We park up in Amersham Old Town car park and walk south to Coleshill, crossing the route of HS2 on the gentle climb up to the village. We'll cross its path again later in our walk (as we return to Amersham along the South Bucks Way). Enough has been said here and here about HS2 so I won't reopen that festering wound!