I am going to get married secretly in two weeks without the approval of my parents.what are the consequences?

i am palestinian and my partner is british.i am a muslim and he used to be christian since he has converted to get married tome.my parents completely refused his proposal as they thought he is a bit old and he is divorced,i am 26 and he is 48.despite the disagreements of my parents we stayed together.we have been together now for two years(8 months of them were after my parents refusal).i am still in jordan and planning to travel to england next week to get married to him secretly in an islamic marriage ceremony until we get the certificate of approval for our civil ceremony.my parents know that i am going to england to attend a friend's wedding and they approved my travel after a lot of arguments but they have no clue about what is going to happen.we are planning to tell them after we get married that we met in the wedding and decided to get married.i am scared of their reaction.i dont know what are the consequences of this action.we are so determined to do it because we are madly in love with each others,we could not break up.he came to visit me few times becasue neither of us can imagine life without the other.anybody has any similar stories who could advise me how to prepare myslef to confront my parents later on?could any of them fall ill or get a heart attack or something?i am not eloping i only consider it a change in the plan.i do not want to lose him and i believe my parents will come around eventually.any helpful comments?