Things you can claim for on tax returns

[Pastyspark]

Heard all sorts of stories over the years, builder claiming for speed boat engine as he used it to entertain customers. Holiday letting company who claimed for their 13 and 15 year old kids mobile phones as they might want them to fetch stuff in their apartments and need to get hold of them.
My thinking is you can claim fot what you want until you get the dreaded investigation them you've got to justify it to HMRC who I'm sure will be understanding