The United Kingdom has opted to leave the European Union, this may make travelling and visiting my holiday home abroad more difficult, or even stop me from working abroad in the future.
My mother is about about to get an Irish passport, as her mother (my grandmother) is Irish. After the paperwork is complete I can also apply for an Irish passport.
Question: What negative things may happen if we get a second passport? I do not want to have to fight in the army, face any tax issues on my savings, nor would I want to lose any of my inheritance money if my mother were to pass on.
Additional info: I am 22, a British citizen with a UK passport, I was born in UK along with both parents. I spend almost all my time within UK, except maybe a short holiday every few years. Currently I am a university student, but in future I will just work an ordinary 9 to 5 job, I do not believe I will operate a business or invest in anything more serious then a few Funds. This also applies to my mother. All our banking is within UK.