Conwy MP Betty "Bach" Williams will retire at the next General Election, which answers one question which has been hanging around for a while. Due to boundary changes some of her previous seat had moved to the new Arfon constituency with the rest in the new Aberconwy constituency. Although both these new seats are nominally Labour, Betty had a big problem in that both are vulnerable come the next election.
Aberconwy, won by Plaid in the Assembly elections, will almost certainly be lost to the Tories and Guto Bebb. Betty would be facing a big struggle to "defend" that seat. She would have a much better chance in the Arfon seat as she is from that area and would get a strong personal vote. Unfortunately for her Martin Eaglestone seems to have a lock on every election that covers Caernarfon, even though he's lost more than anyone dare count! She was therefore left to defend, and probably lose, Aberconwy or to retire. At the age of 64 it's no shock that she chose the latter.