I have linked the 2018 UK Tory government GRA reform consultation document below. It is well worth a read by those many opponents of the Scottish GRR Bill who have dismissed that Bill in outraged terms. It sets out convincingly why reform is needed. https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/721725/GRA-Consultation-document.pdf
Given the mess the UK passport office has become, getting a passport or driving license is getting very difficult or at least time consuming for people.
Perhaps this is the reason they object to this bill, if a person changes their gender and need a new passport this would put extra pressure on what is already a system that is cracking up at the seems due to mostly incompetence or the lack of will to ORDER staff to get back in the office and sort the mess out ( I am under the impression work from home is a major factor in delays, so happy to be corrected).
Would make sense even if that reason is totally pathetic and probably easy to solve.
@zleap Interesting theory but in fact you can change the gender on your passport and driving licence without a GRC.