A Plaid Cymru spokeswoman e-mails to explain why the party's MPs will be crossing picket lines today:
"Plaid's AMs have supported the right of the PCS union to withdraw labour during this dispute by not crossing their picket lines. Plaid is urging the Westminster government to return to negotiations with the union immediately and the Assembly group will be writing to the Gordon Brown's government to impress on them the need to do so.
"It is also inconceivable that Members of Parliament representing Plaid Cymru should not attend the budget debate today.
“It was a tough decision between supporting the strikers and the importance of the up and coming budget on public sector workers given the agenda of the two main parties in Westminster.
"There is a difference between this and the meaningless attempts by opposition parties in Cardiff Bay to score petty political points during such a worrying time for so many public sector workers.
“Their actions show how little they care for the people affected by the Westminster government's plans to cut redundancy payments."