sentences:  The local authorities in the Denbigh division were the Municipal Boroughs of Denbigh and Ruthin; the Urban Districts of Abergele and Pensarn, Colwyn Bay and Colwyn, Llangollen, and Llanrwst; and the Rural Districts of Llangollen, Llanrwst, Llansillin, Ruthin, St Asaph (Denbigh), and Uwchaled, part of Chirk, and the part of Glan Conway not in Caernarvonshire.The local authorities in Denbighshire were reorganised in 1935, but that did not affect the boundaries of the parliamentary constituency.In the redistribution which took effect in 1950, the division was redefined as comprising the Municipal Boroughs of Colwyn Bay, Denbigh, and Ruthin; the Urban Districts of Abergele, Llangollen, and Llanrwst; and the Rural Districts of Aled, Hiraethog, Ruthin, part of Ceiriog, and part of Wrexham.