My family and have been renting the same property for several years. Last year we started looking for somewhere to buy and had flagged as such with owner. It took longer than planned then in early January we got an email from her ending our tenancy two months later. We asked for a bit more time and got two more months. We have now found somewhere but it will take some time to close sale etc. Having had a chat with a friend it transpires that - and I didn’t know this was vital - that the landlord didn’t actually give us proper notice eg through a section 21 form, instead it was just an email. Any advice? We have been looking into short term lets but this has shaken me a bit. Are we within our rights to challenge her?