162068/162076 McDonnell Douglas AV-8B-4-MC Harrier II
c/n 512017/17-512025/25.
162068 converted to AV-8B+-24-MC 165310
165309/165312 McDonnell Douglas AV-8B+(R)-24-MC Harrier II Plus
c/n 267 to 270
Were BuNo 162083, 162068, 162074, 162087 remanufactured.
Presubably at some point during or after remanufacture it was withdrawn and made its way over the atlantic as a BDRT (Battle Damage Repair Training) airframe.
So technically it is RAF, yet is also an MD AV-8B, rather than a BAE Harrier Gr.5/7! This explains the lack of UK military serial and the intructional airframe no. (xxxxM)
Considering the conversion from 162068 to 165310 involved the fitting of radar, you wonder if this was when this nose came off - and this was one of the first aircraft converted in the mid 90s. It was originally built in 1984.