Aberffraw is the name of my new OO gauge layout, based on the village on Anglesey, North Wales.
Aberffraw never actually had a railway station, but in this 'universe' it does. I have created a rough plan of the layout (in its prototypical site) by using www.old-maps.co.uk. The red on the plan shows the track; the dark blue: the contours at 5m (shown as dark orange on a modern OS map).
The idea is that it is a branch line station on a private railway (latterly absorbed by the LNWR).

Here is my 'history' of the Aberffraw Railway (historical inaccuracies in italics):
Aberffraw is a small fishing village on the south-west coast of Anglesey, North Wales.
Aberffraw was the name of the royal family of the kingdom of Gwynedd, of which covered most of North Wales. Their palace: (the) Llys; where the Princes of Gwynedd resided; was less than a mile from Aberffraw. Llewellyn the Great, Prince of Gwynedd conquered and unified Wales, himself becoming the first Prince of Wales.
Aberffraw are proud of their regal links to the past, celebrating it with various businesses named after Llewellyn himself, or (the) Llys.
(The) Llys no longer exists: as it was dismantled and its building stone used in the construction of Beaumaris Castle. Its foundations only remain.

Bodorgan station is currently the closest station to Aberffraw, built in 1849.

History of the Aberffraw Railway (by Dick Tate):

The origins of the line began in 1864, when a Mr. Thomas Gwyn: a local stone merchant of the Aberffraw Gabbro Company: built a tramway from his quarry at Penrhyn to the quay at Aberffraw to allow his Gabbro to be taken by sail-barge to Bangor. However, exporting Lime by sea proved to be ineffective, with only a small market buying his granite at Bangor.
Residents at Aberffraw became interested in the venture and proposed that an extension to Bodorgan Station be made; as the fishing industry in Aberffraw was dwindling and the locals didn't want to make the long, uneven trod to the railway station; in order to go to-and-from Aberffraw, often with their goods. Gwyn obliged, after receiving an Act of Parliament in 1868; the Aberffraw Railway Act, he rebuilt the original tramway from 3' gauge to standard gauge and extended it to a junction near Soar, where the line ended and joined the LNWR's Chester-Holyhead line.
At the junction was Soar station, a station built after the LNWR refused to operate the line or open a new station to allow traffic access to timetabled passenger services on the main-line.
There was also a number of sidings; where Gabbro; fish and other goods would await to be taken by the LNWR to either Holyhead or Bangor.
Meanwhile at Aberffraw, the station and goods sidings were constructed just off Malthouse Lane and near Cellar Mill. The infrastructure of the railway were unsubstantial and was cheap and cheerful of light railway standard: the buildings were wooden and the platforms were nearly track level, made of gravel and a stone curb edge. The railway was supplied with a Manning Wardle F Class 0-4-0 loco: named "ABERFFRAW", which remained the workhorse for the railway throughout its life. This was joined by "SOAR" (a Manning Wardle H Class) in 1872 (").
The railway's passenger service ran from Bodorgan to Soar via the LNWR main-line, where at Soar, the trains would reverse and go to Aberffraw, via Fishing Lodge Halt (later re-named Treiddon Halt) and Pandy Halt (opened 1874, as a request stop). The train would continue from Aberffraw Station along the side of the Afon Ffraw betwixt' the village, past Aberffraw Quay to Penrhyn Halt (opened 1873). Meanwhile a passenger service also ran up the Henllys branch to Henllys Halt.

In the early years of the railway, there tended to be only a few passenger services every week, as there wasn't much demand. Those passenger trains tended also to be mixed with goods; of which made up most of the traffic on the railway. Gwyn's railway was a modest success, as he managed to sell more lime. Gwyn later bought multiple quarries near Henllys and set up quarries near Treiddon, these would all be served by the railway.

Near the end of the 19^th century, tourism came to Aberffraw, as the Victorian Elite wanted to explore Snowdonia and the rugged coasts of North Wales.
In 1880, the railway's proximity to Cribinau, an chapel island, of which St. Cwyfan's Church sits upon. This became a romantic image for Anglesey and Aberffraw and soon posters were being advertised by the LNWR of Aberffraw and Cribinau, payed for by the Aberffraw Railway. Year by year, tourists, day-trippers and picnickers flocked to North Wales, some to the Aberffraw Railway.
With this added publicity; the LNWR proposed to lease out the Aberffraw Railway, in order to gain more money from operating, rather than goods and passenger service receipts on the Aberffraw Railway operating their trains from Bodorgan to Soar. In July 1880, the LNWR confronted the Aberffraw Railway over the potential lease of the railway. The Aberffraw Railway agreed, on the conditions of a new junction-station be built at Soar: like previously proposed. The LNWR disagreed, however came to a compromise that the Henllys branch be extended to follow the main-line and join at Ty Croes station. By Septmember of the same year; the LNWR was operating goods and passenger services over the Aberffraw Railway. In the same month, the passenger service from Soar to Bodorgan ended, as Ty Croes had become the junction station for the line.
The LNWR soon decided to build a Hotel (The Railway Hotel, later known as the Aberffraw Hotel) next to the station, beside the ticket office and waiting room, on the site of the original Aberffraw Railway offices. The new offices were built to the other side of the Goods Siding. Beside the Aberffraw Railway offices, the LNWR offices were built.
From then on, the LNWR influenced much of the Aberffraw Railway's trading, turning the line into very much an ordinary outpost of the LNWR: Posters were pasted onto the waiting shelter at Aberffraw Station, the trains running in and out of Aberffraw were mainly made up of LNWR rolling stock except for the locos, during the Aberffraw Railway's local timetable.
The shelter itself was rebuilt by the LNWR in 1883 into a wooden waiting room and ticket office, replacing the older ticket office (and waiting room) beside the crossing and next to the Railway Hotel, which later became the Goods yard office for the Quarry Sidings and Goods Shed on the other side of the Mill Leat. A weighing scale was built outside the office, where road vehicles would stand for weighing and valuing (for railway shipping prices).

In 1882,"ABERFFRAW" and "SOAR" were given LNWR numbering of 6754 and 6756

From then on, the Aberffraw Railway continued to run in its humble existence, with very few events or mishaps affecting it.
The grouping of 1923 meant that the Aberffraw Railway became part of the LMS.
The Locos were renumbered again, "ABERFFRAW" to 56746, and "SOAR" to 56747.
Unfortunately, the LMS had their doubts over the locos and considered sending them to work at Clee Hill or even scrapping them! Luckily this never happened and the 'old ladies', as the locals affectionately called them, continued on regardless.

The Aberffraw Railway's demise eventually came in the 1930s, as motor vehicles had taken much wanted passengers from many short rural branch lines, such as light railways. Demand for passenger services dropped and the branches became to expensive to run, and thus rather sadly, the curtains drawn to a close.

The Aberffraw Railway closed to passengers in 1930, coinciding with the closure of the Red Wharf Bay Branch. However, the Aberffraw Railway wasn't as lucky as the Red Wharf Bay Branch; as it closed to goods traffic in 1933 (rather than in 1950).