Voter fraud is pretty much non-existent in the UK. The reality is that the new 'free' voter ID is difficult to get, Councils have not been given the resources to issue them effectively, meaning millions are effectively disenfranchised. It is blatant voter suppression which impacts Labour voters the most.
Many people still do not know voter ID is now mandatory. This law goes much further than anything tried by the Republican Party in the USA.
That's not completely true, only in person voting requires ID. You can apply for a postal vote or drop it off at the polling station by hand without showing ID.