2. That length starting at the junction of the trunk road with the road known as Lôn Cefn Glyn (Class 3 road) (marked point BB on the deposited plan at site plan No. 1), and extending in a southerly direction for 0.49 kilometres to the junction of the trunk road and the access to the property known as ‘Grugan-ddu’ (marked point CC on the deposited plan at site plan No. 1).