tie bars

Hello, I've just bought a 1930s semi and it has tie bars which my structural survey said suggested minor historic movement, but with no ongoing concerns. However since I've purchased, I've read lots of horror stories about tie bars being red flags for buyers and insurers, and I'm driving myself...

Do I need planning permission? I want to change my 14-year-old polycarbonate roof to an energy-efficient glass one. My conservatory is 6m x 3m and has two tie bars with a box gutter at the back. I understand I will need a new box gutter but will I also need the support of a tie bar/bars with...