Rhondda MP Chris Bryant has called for a commemorative shield to be erected in the House of Commons in memory of PC Keith Palmer who died in Wednesday's Westminster attack.
The heraldic shield is usually reserved for MPs killed while in office.
As well as honouring MPs killed in wars, there are also shields in memory of Conservative MP Ian Gow, who was killed by an IRA car bomb in 1990, and Tory shadow Northern Ireland secretary Airey Neave, who died in a car bomb attack in Westminster in 1979.
Conservative MP Byron Davies (Gower), a former London Metropolitan Police officer, added his voice to the tributes paid to Pc Keith Palmer and said security services must be supported.
