Voters will go to the polls today in a by-election that could mark a historic shift in Welsh politics.

Labour has run the Welsh Parliament since the devolved administration was first established in 1999 and Caerphilly has been one of its strongholds.

But opposition parties hoping to form the next Welsh Government have run fierce campaigns in the South Wales constituency.

Polling stations opened at 7am and close at 10pm, and the result is expected in the early hours on Friday.

In recent polling, Plaid Cymru and........

© South Wales Argus