Which ones? The French have requested help with heavy lift, recon and Chinooks from the UK. The only UK request was for an Atlantique temporarily (as in a week or 2). As far as I am aware that tasking is now with the USN and Norwegians until the RAF's P-8 are operational. I'm not aware of any other requests or indeed 'sharing' of assets.Both countries currently even share some aerial assets to reduce costs.