Ceredigion (UK Parliament constituency) towns which comprised the Boroughs varied slightly over this long period, but primarily consisted of Cardigan, Aberystwyth, Lampeter and Adpar, the latter now a suburb of Newcastle Emlyn across the Teifi, in Carmarthenshire. The county constituency (for the purposes of type of returning officer and electoral expenses) was enlarged in 1983 with the addition of part of Pembrokeshire, being renamed Ceredigion and Pembroke North. In 1997 it reverted to its former boundaries, being renamed Ceredigion. The Ceredigion Welsh Assembly constituency was created with the same boundaries in 1999. Since 2017 the seat has been held in Parliament by Ben Lake
History of the Welsh language such as Cardiff with an increase from 6.6% in 1991 to 10.9% in 2001, and Rhondda Cynon Taf with an increase from 9% in 1991 to 12.3% in 2001. However, the number of Welsh speakers declined in Gwynedd from 72.1% in 1991 to 68.7%, and in Ceredigion from 59.1% in 1991 to 51.8%. Ceredigion in particular experienced the greatest fluctuation with a 19.5% influx of new residents since 1991. The decline in Welsh speakers in Gwynedd and Ynys Môn may be attributable to non-Welsh-speaking people moving to North Wales, driving up property prices to levels that local Welsh speakers cannot