Mr Little says that the murder of Sarah Everard justifies a sentence in which Wayne Couzens would never be released from prison.
He argued on behalf of the CPS that it does meet the high seriousness threshold because "of the nature of the kidnap and from then on the use of his position as a constable".
The timing and the circumstances of Couzens being a police officer and his use of warrant cards to arrest Miss Everard was aggravating, Mr Little argued.
Had he not been a police officer, Miss Everard would not have got in the car, the CPS say. And having taken the police oath, the seriousness threshold is reached.
Mr Little, addressing Lord Justice Fulford, said: "Then the guilty plea and any other mitigation does or does not cause this to become a borderline case as oppose to a non-borderline case."
Arguing that it pushes beyond the borderline, he said there were a number of aggravating factors, including that he used his position of a serving police officer using his knowledge and equipment.
He also pointed out the significant planning and premeditation of the hire car, plastic sheeting and moving items to London as further aggravating factors
The judge sentencing Wayne Couzens asked the Crown Prosecution Service what the circumstances were surrounding the murder of MP Jo Cox.
Thomas Mair was jailed on a whole-life tariff for killing the MP.
Lord asked Mr Little QC for a summary on how the judge in that case was able to pass a full-life sentence.
The lawyer pointed out he was junior counsel in the trial, and said this was due to it being a "politically-motivated murder" involving a knife and a firearm.
He added: "It was a firearm that a farmer might use to shoot vermin rather than necessarily a weapon you'd expect to find in a murder case."
But Mr Little said: "The primary reason was - she was an MP, outside her surgery in Batley and was attacked outside in the street."
Sarah Everard murder: Wayne Couzens 'may have abused lockdown powers to arrest and kidnap victim'
That's it for today. Defence tomorrow, brace yourselves