Completion of the Cap A5C

Further to my matter, the Cap A5C was helpful and the client is now selling property and exchange of contract of sale in process however the buyers solicitors have stalled, now asking the vendor to complete the FR1, noting this is a property was never registered though we have the original title deed dated 1927. My understanding is the sale of an unregistered property triggers compulsory first registration with HM land registry. Provided the original deeds, clear root of title and any other documents are provided to prove ownership, it is the buyers solicitors who submits the FR1 + form DL etc and the buyer absorbs costs as part of the conveyancing, from the outset, these complexities around the title were clear to the buyer. I am keen to hold fast and push this process back to the buyer solicitors which seems reasonable to me. Any thoughts?