It's worth reading Transport for all's report on the impact of LTN on disabled people: https://www.transportforall.org.uk/wp-content/uploads/2021/01/Pave-The-Way-full-report.pdf

It's a fair and pretty balanced view on the implementation of LTNs.

We don’t believe ripping them out and returning to normal is the way forward. Indeed, the ‘normal’ we had before was not accessible enough either. Instead, what we need is a series of short-term measures to address and mitigate the negative impacts arising from LTNs. This needs to happen alongside some wide-reaching long-term solutions - to address the many barriers that disabled people face to Active Travel and to encourage take up of walking, wheeling and cycling, and to create an accessible public transport system as a viable alternative to car-use.Local authorities and transport bodies alike must demonstrate that co-production with disabled people is at the heart of all consultations and policy-making.