Justice Secretary Chris Grayling has set out the terms for the pre-legislative inquiry into whether prisoners should be granted to right to vote.
He said: "Parliament is sovereign in this area.
"Nobody can impose a solution on parliament but the accepted practice is that the United Kingdom observes its international obligations."
Shadow justice secretary Sadiq Khan said allowing prisoners serving less than four years to vote would lead to 30,000 inmates going to the polling stations.
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Outbreaks of rain and strengthening winds will affect southernmost parts of England and Wales today.
An earlier debate on the issue was suspended as an 'expression of support' following the Westminster terror attack.
Five people were killed and dozens more were injured after a car and knife attack in the capital on Wednesday afternoon.