The majority of EU member states are contributing to EUFOR TCHAD/RCA. The specific contribution of other EU member states is a matter for them. Further information on EUFOR TCHAD/RCA can be found on the website of the Council of the European Union:
The UK is providing four military officers under standing EU headquarters augmentation procedures as part of the operation: two officers in the operation HQ at Mont Valerien in Paris and two officers in the force HQ in Chad. There is also one British staff officer attached to the French NATO Rapid Deployment Corps which France has recently deployed to Chad.