OK, my first sketch for critique. Um. Uh. Well, here it is then... 
Prince Harry's Voluntary Service Over Here
EXT. DAY. CAR PARK OF A SUPERMARKET – MORE LIDL THAN WAITROSE.
PRINCE HARRY, LONG STICK IN HAND TO HELP HIM WALK, JUNGLE FATIGUES AND BACKPACK, IS APPROACHING THE SUPERMARKET.
HE IS MET BY NATIVES – ERRR -- STAFF - MAZ, BRITNEY AND STU.
HE'S FOLLOWED BY FEMALE TV NEWS REPORTER, IMOGEN, WHO BECKONS TO A CAMERAMAN AND FOLLOWS THE PRINCE.
IMOGEN VO Prince Harry proves himself once more the Prince of action, joining
Voluntary Service Over Here, first parachuting in and then trekking through the
suburban jungle, despite heavy camera flashlight fire, finally reaching his
working class goal.
CUT TO IMOGEN LOOMING LARGE IN THE CAMERA LENS.
And for a brief interlude in a princely career, he's just an ordinary ginger
nut blending in seamlessly with local workers (PRONOUNCES FOREIGN NAMES
CAREFULLY) Maaaaz, Breetnee and Stew, all keeping the infrastructure going in
(PRONOUNCES CAREFULLY) Cray-deet Crunchland.
HARRY'S VOICE IS HEARD BEHIND IMOGEN.
HARRY OK, ya. I've brought in Red Cross food packages … Move your booty!
HARRY PUSHES IMOGEN AWAY AND DISPENSES DUCHY OF CORNWALL BISCUITS.
CUT TO INT. DAY. SUPERMARKET. HARRY, MAZ, BRITNEY & STU DIGGING IN THE MIDDLE OF AN AISLE.
IMOGEN VO But the Prince is eager to explain the aim is to make staff self
sufficient …
PRINCE HARRY STOPS WORKING AND LOOKS UP.
HARRY OK ya. We're digging a well here. Maz, Stu, Britney (HE SIDLES UP
TO BRITNEY) and me. Digging deep and then filling the well with …
MAZ STANDING BY DRINKS' SHELVES, THEN STU, THEN BRITNEY, FINALLY HARRY FORM A CHAIN.
MAZ HANDS BOTTLE OF CHAMPAGNE TO STU. STU PASSES IT TO BRITNEY WHO, SHYLY FLIRTATIOUS, HANDS BOTTLE TO HARRY. IMOGEN IS ON HAND TO GIVE HIM A CORKSCREW FOR THE PHOTO OPPORTUNITY. HARRY UNCORKS THE CHAMPERS BRANSON-STYLE, SPRAYING ALL AND SUNDRY.
HARRY (WAVING BOTTLE) … Moet Chandon, ya!
CUT TO INT. DAY. A NOW SOAKED IMOGEN DOES PIECE TO CAMERA.
IMOGEN And Prince Harry's already drawn up the plans to construct the
tower of ‘Buy One Get One Free' Heinz beans! And he teaches the locals how to
create decoys when dealing with an infestation of paparazzi!
CUT TO HARRY INSTRUCTING MAZ, BRITNEY AND STU ALL IN GINGER WIGS.
IMOGEN VO And even the most elitist sports can be adapted democratically to
local conditions.
CUT TO HARRY WITH BRITNEY PERCHED ON A TROLLEY. MAZ AND STU ON SEPARATE TROLLEYS. THEY PLAY SUPERMARKET POLO DOWN THE AISLES WITH BAGUETTES AS POLO STICKS AND A CAN AS BALL.
And with practicality, like Diana, he shows compassion, a true Prince of Hearts …
CUT TO SHEEPISH HARRY CAUGHT WITH BRITNEY SITTING ON HIS KNEE.
CUT TO IMOGEN WHO IS NOW PERFECTLY COIFFED AND DRESSED DIFFERENTLY.
IMOGEN Finally the Prince has to leave his new found friends and colleagues
clutching his well-earned Cray-deet Crunchland IOU payslip and his reusable
plastic bag, a gift from grateful co-workers.
CUT TO EXT. EVENING. HARRY LEAVING DOWN A RED CARPET, DICK WHITTINGTON-STYLE WITH A PLASTIC BAG NOW ON HIS STICK WHICH IS OVER HIS SHOULDER. HE GIVES A SALUTE AND THEN A WAVE TO THE STAFF, FLASHING A SMILE.
CUT TO STAFF WAVING AND BRITNEY WEEPING.
IMOGEN VO And for our next special report Tony Blair goes on leave during
the Silly Season and we accompany Jordan as she temps as Middle East Peace
negotiator!
ENDS
(wrote it under the pressure of time so didn't really think of where it would be performed). Maybe I should cut out the "working class goal" bit now I think about it and that would make the tone less laboured? Whaddya think?