I made it to Arish Mell at 4pm with low water and tried filtering puddle water which worked but the filter kept blocking... I avoided the muddy puddle stream that the cows were shitting and pissing in. A good samaritan arrived and have me some water... I headed up to Lulworth Castle and then to Povington Hill, deciding to try and get the Tyneham to Kimmeridge section done as well...depite not having my headtorch, time for some dusk walking!