To be fair, it’s quite common in weddings abroad for best friends and family to not attend for multiple reasons.
I went to one once and never again, it was insanely expensive to pay for the flight and fancy hotel (brides always pick the fancy ones), there was only weekly flights so we had to stay a full week, took a week off work and then had to spend the whole week with the bride and grooms family who I barely knew. They wanted to do things all the time as a group. When you’ve paid all that money for essentially a holiday, let me have a holiday at least for 6 of the days. We couldn’t even eat breakfast in peace without someone joining us mid way.
So I get it! Perrie might not even get on with Leighannes friends, I’ve never seen them interact so she may of just been like, nah not going all that way!