Not at all. Different countries, different rules. I can't vote here either and I would be losing my right to vote completely but for the fact I applied for my Hungarian citizenship, and they actively want their diaspora to vote, as overwhelmingly they vote for Orbán and Fidesz- the idiots currently in charge.
Which is why it is always my pleasure to vote against them despite not living there.
Edit to add:
A bit part of the reason why I left was that Cameron got in, and a lot of people, when I voiced my displeasure was "uh well if you don't like it why don't you fuck off?" And then when I fucked off they were all like "uhh, well you fucked off so you don't get an opinion, and shouldn't have a right to vote". Weirdly I reckon British people abroad would broadly vote against the government, which is probably why it's not allowed after X time. Diaspora from Britain are basically citizens that chose to leave, whereas in other parts of Europe the ones with second citizenships are people who were forcibly removed/or borders moved.