BAe Systems Nimrod MRA.4
From Canadian Power Wiki
However the project was subject to significant delays due to cost over-runs and contract re-negotiations. This was partly due to difficulties combining refurbished Nimrod MR2 fuselages, which had not been built to a common standard, with newly built wings. The numbers of aircraft to be procured fell from 21 to nine over a course of years, while costs continued to climb.
The MRA4 was ultimately cancelled in 2010 as a result of the Strategic Defence and Security Review, at which point it was £789 million over-budget and over nine years late. On November 23rd, 2010, the UK announced its intention to order twenty-four P-8 Poseidon ASW aircraft, effectively replacing the Nimrod.