does anyone know of any easyjet promo codes that will work with flights from Paris to Nice and Barcelona to Stansted?

Wrong forum dude.

You'll be crucified mentioning that name here.
Better go and take a look in the budget travel forum.
AFAIK no such codes exist.

sorry, new to this

Hi francebound,
Welcome to FlyerTalk.

Before you post further questions in the wrong place, please have a read of this guide, plus any other sticky threads at the top of other forums:

Sticky: Welcome to the Mileage Run Forum - Important information how the MR forums work

Please read this sticky thread which lays out what belongs in the Mileage Run forums. Notice that the subject is the sharing of fares which accumulate status miles on airlines in international alliances. Fare requests (nor other requests) belong in theis forum; it's for sharing the Deals.
The MR Discussion forum is for discussing specific mileage runs and for expired deals.

Generally, FlyerTalk is centred around miles and points and isn't a place for discussion of coupon codes except for car rental programs.

Anything relating to the sharing of deals or questions regarding budget airlines (those without full service and frequent flyer programs) belong in the Budget Travel forum.

Otherwise, check the Other European Frequent Flyer programs forum for info on non-mainstream European FFPs.

Good luck. There are a few good threads on budget travel - mostly to warn people of the hassles, risks and costs hidden in these budget fares.
The RyanAir warning thread is quie memorable!

Regards,
BiziBB, Moderator, Mileage Run forums

IMHO Easyjet don't offer promotional codes.

Promo codes for Easyjet tend to do with people who had earlier flights cancelled and who are rebooking - it happened after the liquid bomb scare where Easyjet cancelled all their UK flights and allowed people to rebook at no extra cost