[Jon]

No, why would it? I don't think they struggled to sell tickets. Enough people want to attend that any that got tickets who can't now make it because of lack of transport could be replaced several times over by people who didn't get tickets originally. Don't believe everything in the Daily Mail. The rail strikes will have zero effect on the programme. Unless Rylan was arriving on the day by train?

I guess theres two questions here.

Will it effect the production of the show - no of course not

Will it effect the fans - yes absolutely.

It will affect fans. If they have enough notice I’m sure the arena can still be full. If there is some way distributing tickets.

In reality though I’d imagine a lot of people will want to hang on until the last minute though to see if they can arrange anything or plans change. Although for the strikes to be called off they need a few days notice. 

I think in reality any strike action will be put on hold for the competition as if it effected the contest it would be embarrassing for the UK government and probably not reflect well on the unions.