I think what most people forget when they give example of UK and other developed countries is that their reason to debate introduction of EVM is different to our reasons in Pakistan.
In UK you can go to a voting station without any ID or documentation, state that you are from this street and house number and you are handed the ballot paper to vote and your name is crossed on the list. Ballot paper is nothing special and you mark ballot paper with a pencil. there are no polling agents from contestant parties either except during counting.
despite this there has never been any issue with rigging. So there issue is a debate to introduce EVM to cut cost and announce results quickly. This is not possible unless these EVMs are connected to a network this is where the issue of security is most significant for them. Also if a system is working without any issues, why change it!
Pakistan's situation is different. Current system is not working. ballot box stuffing is common. recounting almost impossible. people die, no one accepts results. etc etc.
Pakistan's EVM is two in one. EVM and physical vote. Each vote casted has a printed vote too which is placed in the ballot box. The printed vote is visible to the voter and he will place it in the ballot box.
Opposition parties haven't even seen the machine, they refuse to see it (even though they know everything about it) refuse to suggest where the problem areas could be. Basically refuse to say anything other than that we want to stay how we are.