Below are two petitions posted to Downing Street web site page for petitions and rejected, with the reasons.

PETITION. (COPIED)
We the undersigned petition the Prime Minister to Fulfil his 1997 manifesto pledge to bring in a form of proportional representation for General Elections.
When the Labour Government was elected in 1997, one of their primary manifesto pledges stated: "We are committed to a referendum on the voting system for the House of Commons."
In 1998 the Jenkins Commission concluded that:
"The Commission's central recommendation is that the best alternative for Britain to the existing First Past The Post system is a two-vote mixed system which can be described as either limited AMS or AV Top-up. The majority of MPs (80 to 85%) would continue to be elected on an individual constituency basis, with the remainder elected on a corrective Top-up basis which would significantly reduce the disproportionality and the geographical divisiveness which are inherent in FPTP".
There are some good alternatives to pure PR which combine FPTP and PR to give a workable, more representative system.

PETITION REJECTED BECAUSE
It contained party political material.

RUBBISH!
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PETITION.
We the undersigned petition the Prime Minister to Hold a referendum on reform of the system of elections to the House of Commons to introduce a more proportional system in place of First Past the Post.

REJECTED BECAUSE
It was similar to and/or overlaps with an existing petition or petitions.

THEY DON’T SAY HOW MANY!
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The same message, is expressed many times, in many differently worded ways, many rejected with similar reasons and many accepted and gathering signatures. Many leave themselves open to rejection by using language fraught with frustration and anger and are thrown out, but the message is the same.

Nowhere during this government have I seen an answer to the question raised in my first example, or a commitment to honour the promise made by New Labour in 1997. But that is typical representation suffered over the last two decades, under the system Labour and Tories have hung on to with such desperation. HOW CAN WE ESCAPE SHORT OF REVOLT?