Mapping Mountains – Significant Name Changes – The Welsh P15s

Pt. 423.1m (SH 715 748) 

There has been a Significant Name Change to a hill that is listed in The Welsh P15s, with the summit height, bwlch height and their locations, the drop and status of the hill derived from LIDAR analysis conducted by Myrddyn Phillips. 

LIDAR image of Pt. 423.1m (SH 715 748)

The criteria for the list that this name change applies to are:

The Welsh P15s – Welsh hills with 15m minimum drop, irrespective of their height, with an accompanying sub list entitled the Welsh Sub-P15s, with the criteria for this sub category being all Welsh hills with 14m or more and below 15m of drop.  The list is authored by Myrddyn Phillips, with the Introduction to the list appearing on Mapping Mountains on the 10^th May 2019. 

The Welsh P15s by Myrddyn Phillips

The hill is adjoined to the Carnedd Llywelyn group of hills, which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and it is positioned with the A55 road to its north, a minor road to its west south-west and the B5106 road to its east, and has the town of Penmaen-mawr towards the north.

When the listing that became known as The Welsh P15s was being compiled, this hill was included in the main P15 list under the transposed name of Graig Lwyd, which is a prominent name that appears to the north of its summit on the Ordnance Survey 1:25,000 Explorer map and which is more applicable to an adjacent quarry rather than that of the hill. 

Extract from the Ordnance Survey 1:25,000 Explorer map

During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day, with little consideration for the meaning of the name and where it was appropriately applied to.  My preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance transpose the name of a near quarry and use it for that of the hill.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found.

However, on occasion even when research is conducted an appropriate name for the hill may not be found, and on such occasions the listing protocol is to use the point (Pt. 423.1m) notation, and for this hill this is such an example.

Therefore, the name this hill is now listed by in The Welsh P15s is Pt. 423.1m and this is being used as the author has not found an appropriate name for the hill either through historic research and/or local enquiry. 

 

The full details for the hill are: 

Group:  Carnedd Llywelyn 

Name:  Pt. 423.1m

Previously Listed Name:  Graig Lwyd 

OS 1:50,000 map:  115

Summit Height:  423.1m (LIDAR)                                                           

Summit Grid Reference:  SH 71529 74810 (LIDAR)                                                  

Bwlch Height:  406.85m (LIDAR) 

Bwlch Grid Reference:  SH 71352 74759 (LIDAR) 

Drop:  16.2m (LIDAR) 

 

Myrddyn Phillips (March 2025)