A Connect Wall to Fly Over

Question

^{An entry in Fortnightly Topic Challenge #42: Wordless Connecting Walls}

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The 16 images below may be partitioned into 4 groups of 4 connected images.
The overall connection between the groups this time is a little different.
For each group, I want you to choose a fifth member - some of the groups have more than five members so you will need to choose carefully.
Each of the fifth members will be the name of a character from a movie from the year 2000 and the final answer is the name of the movie.
I will add that the knowledge required here is UK specific - all four groups are related to the UK in some way - but can be found easily on the internet.

Can you identify the four groups and the associated fifth group members?
What is the movie in which the fifth group members appear as characters?

Answer 1

From left to right, top to bottom, these images represent:

POSH (nickname of Peterborough United FC), BUSTER Baxter (from Arthur), SHEARER, Tree TOPPER,
Nat King COLE, MEGAMAN, SPORTY, LAMPARD (rebus: LAMP + (-c)ARD),
MONEY, SCARY, EAGLE, G-MAN (from HalfLife),
DANDY, Mickey ROONEY, BABY, AKIRA.

These can then be categorised thus:

Group 1: Nicknames of the Spice Girls
POSH, SPORTY, SCARY, BABY

Group 2: Top-scoring Englishmen in the Premier League (all-time)
Alan SHEARER, Andy COLE, Wayne ROONEY, Frank LAMPARD

Group 3: British Comics
The DANDY, BUSTER, EAGLE, The TOPPER

Group 4: Members of So Solid Crew
AKIRA, G-MAN, MEGAMAN, MONEY

The additional group members we need to choose are:

GINGER - the fifth Spice Girl (Geri Halliwell)
(Robbie) FOWLER - the next highest scoring Englishman in PL history
BUNTY - a British comic
MC MAC - another member of So Solid Crew

Finally, a film from the year 2000 which features characters by all of these names is:

the British stop-motion animated film, CHICKEN RUN, in which all of these characters are chickens who spend the duration of the film attempting to fly over (note this puzzle's title) the fence of their enclosure!