The above link says, the Govt of Pakistan made the 3rd request to the Govt of the UK to deport the absconder former PM Nawaz Sharif. This means that the previous 2 requests were either denied or were not replied to.
The former PM was not convicted in politically motivated cases. Rather, he is convicted of embezzlement, money-laundering, and "income without source". He was not handed any capital punishment either.
According to the link:
The letter has cited Britain’s own immigration laws of 1974 under which any person sentenced to imprisonment of more than four years had to be deported to the country of his/her origin.
Why does the Govt of the UK think that they should not deport the former PM of Pakistan?