Not sure it was a series as such. 4 minute ep's that were included in
the half-hour shows 'Charlie Brooker’s Weekly Wipe', I think.

Anyway I've compiled them into two 30 minute collections.

Pt 01 (Eps 1-8);
00:00 - Time
04:21 - Crime
07:54 - Evolution
11:13 - Computers
15:19 - Money
19:02 - Churchill & WWII
23:00 - Philosophy
26:31 - Climate Change

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Part 02 (Eps 9-15) is here;
   • Philomena Cunk - Moments of Wonder - ...  
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I just came across this which gives a bit of background to the evolution of the character;
   • Cunk on Character