More added to Ladbrokes Live:
Nicki Minaj and Romesh Ranganathan (O2 Arena)
Status Quo and Strictly Come Dancing (Wolverhampton)
49 Winchester (Bristol, Manchester and Glasgow)
Might be a bit presumptuous of me, but I don't think they'll need generate big clashes on Thursday (Pulp x Vampire Weekend x Deftones x Beth Gibbons ), mainly because it's usually the day with the fewest people at the festival. They usually don't have big crowd controls that day. Another thing is that someone might have a very diverse taste or want to see artists from very different genres... (Freddie Gibbs & Madlib x Deftones for example)
Similarly, I don't think artists like Kim Petras, Peggy Gou, and A.G Cook (for example), who cater to a specific audience, will clash that day. However, I do believe that on Friday and Saturday there will be deliberate big overlaps due to the bigger crowds