It is bleeding barmy though – we could pay her eff all and not have to worry, but by being a fair employer, we get additional stress and concern!
Not really, there isn’t really any such thing as an intern in the UK. If they’ve graduated and are entering work, then assuming that you are actually a company and they are doing something for you then they are entitled to minimum wage, and all the benefits of a worker. You can probably escape sick pay and maternity if they aren’t doing regular work but that’s about it.
The only way around this would be if they were purely watching what you were doing, not actually doing anything themselves, (I’m assuming this isn’t the case as it would be a bit barmy to pay someone a salary for 3 months to get nothing out of it yourselves) or if you were a charity or similar.