I thought I would be too late for these tickets as I didn't know until this week she was coming to the UK!
Tickets are still available for seated and standing at the O2 Arena London. To match this deal I also managed to get one of the Travel Lodge deals so got the overnight hotel at London Bridge for just £35 for 2 people!
I think this is a pretty good package with me buying tickets late.
Seated tickets are still available as is VIP standing and ringside seats.
My guess is someone may have a cheaper site, but I don't book tickets often so wanted a trusted site, I still think it is cheap!