Changing planes

Yesterday I bought plane ticket to go to Poland in August, a return one, so it seems I still wanna be in London ;))
The thing is I planned to go one week earlier before the wedding to see Mum & Sis and finally I'll spend only a weekend in Poland, in Cracow, on that wedding... Why? Cause now the tickets are a bit too expensive and I had to change my plans... At least Mum is invited to the party so we'll see each other :))
Anyway, if my family really misses me, they can come to London, too. It's not a big deal :)