Analysis of blood or bone marrow, requested by a specialist or consultant physician, that: (a) is for the characterisation of either or both of the following: (i) TCL1A gene rearrangement; (ii) MTCP1 gene rearrangement; and (b) is for a patient with clinical or laboratory evidence, including morphological features, of T‑cell prolymphocytic leukaemia Applicable only once per lifetime