The Annual Employment Law Update for January 2018 covers key developments in employment law over the past year, including the ruling against tribunal fees, gig economy status cases, and updates on holiday pay and discrimination issues. It also highlights upcoming changes such as gender pay gap reporting and Brexit implications for employers. Additionally, the document discusses the necessity for employers to review policies related to sexual harassment and hidden disabilities, emphasizing compliance with new data protection regulations set to take effect in May 2018.