Nick Thomas
Please correct me if am wrong but was there not a slender delta wing prototype built by Fairley in the middle fifties. As I understand it, the plane was built to study a delta wing performance at low speeds. Therefore it had a fixed undercarriage.
I think you are refering to the Handley Page HP115 Nick. The Fairey design was the FD2, the first conventional aicraft in the world to exceed 1,000 MPH in level flight. A re-winged version, designted the BAC 221, was used also to evaluate the handling characteristics of an ogival delta wing for the Concorde pragramme.
Dude 