By Seamus Duff Rachel Stevens has ended her social media silence to share a throwback photo and reveal she’s written her memoirs. The 45-year-old mum-of-two has been living in the spotlight since 1999 when her band, S Club 7, released their debut single, Bring It All Back. In the years since she has enjoyed some success as a solo artist, acted in a range of TV, stage and film projects, been a contestant on Strictly Come Dancing, and enjoyed personal life highs and lows including the arrival of her children and enduring a doomed marriage. Rachel has not posted on social media as frequently as h…