M W - many thanks. The contact number at the time was 0300 0589 066 but that's 10 years old so may also draw a blank now
One thing to flag though is that the restriction(s) are form K restrictions protecting charging orders issued against one of joint owners. Our PG 76 section 4 explains how these might be overreached and cancelled automatically when selling/buying -
Practice guide 76: charging orders - GOV.UK (www.gov.uk)
I mention this solely as I deal with a fair number of enquiries re charging orders/form K restrictions and how they might be dealt with. But it's still something for your conveyancer/you to deal with as you wish to of course and the PG 76 guidance simply flags an alternative that might be considered