As regards to EasyJet and kosher, the kosher products on easyJet were double wrapped, therefore, the outer packing protected the main packing and then the contents from 'contamination'.
The kosher products have been certified kosher by the relevant council, and the products display the symbol to prove this.
EasyJet added non kosher products as well as kosher products to cater for a variety of pax including Jewish, and non Jewish passengers. I am not sure if it has reverted back to kosher only sandwiches.
But once again the press sniff a story and boom they go OTT.