ترجمه Fellow former Prime Minister

سلام اگر ترجمه" Fellow former Prime Minister" بشه  "همکار نخست وزیر سابق" (البته مطمئن نیستم ترجمش درست باشه)

پس "همکارِ سابق نخست وزیر " ترجمش به انگلیسی چی میشه؟ 

احتمالا ‌منظور، نخست وزیر سابق هم رتبه بوده و ترجمه "همکار نخست وزیر سابق" غلطه

Boris Johnson has joined the growing Tory civil war over Rishi Sunak’s decision to scrap the HS2 line to Manchester.

The former prime minister said he agreed with his fellow former prime minister, David Cameron, who said the decision was “the wrong one”.