My mother had a cup of hot coffee spilt on her on LH in F, and all she got was a terse "Sorry!" - not even paper towels to mop it up or help doing so.

She wasn't exactly impressed when I said that it was her own fault for wearing white on a plane and inviting things to be spilt on it though! (I like winding her up that way.) She still looks at me with a suspicious glare when I make positive comments to her about LH but she didn't seek compensations or anything, although given she was in F she said a bit more than a terse 'sorry!' would have been nice, such as a bunch of paper towels and assistance with cleaning it up, enquiring about whether she was OK and not burnt, and perhaps a dry cleaning voucher.

I personally would certainly not expect £100 for IFE failure or for spilling stuff on my clothes - certainly not in Y and not even in F. I see Y like a bus, where I'd expect to get from A to be and everything else is 'handy frills'. Maybe £20 HighLife Shop voucher or 2,000-3,000 Avios, something like that, at most, if I am inconvenienced by it.

(In truth I wouldn't have even noticed the IFE failure unless I decided to have a gook at the moving map such is my disdain for IFE. I even declined the offer of Avios when there was a general IFE failure in F because I wasn't affected by it by virtue of not wanting to even watch it, until the CSD insisted I took it because it was a general offer to the whole cabin.)

A general word of advice - avoid wearing anything that requires dry cleaning and anything light-coloured on public transport if at all possible. Spillages happen, even if it's not by a cabin crew member! Anything you wash on a flight dries incredibly quickly, so you could potentially ask for the PJ from F (assuming it was cabin crew who spilt something), wash your clothes, and have it dry before you get off.