Re: The cynical part of me...
What a bizarre view of the world.
It's not a wildly unreasonable assertion. Who is going to come out worst from a system that relies on internet-based individual registration that requires some form of id, hint: they're not rich and living in Kensington and they're not very likely to vote Tory anyway. If there's a huge hole in support for non-Tory candidates where there shouldn't be one because people are being turned away at poll stations candidates in the final election tally there's a fair chance of the courts nullifying the outcome, and that's going to be extraordinarily expensive.
Personally speaking I make sure my credit report is correct and I have a recent passport so my registration went through very quickly but the holes in the thing are glaringly obvious.