Lots of big businesses - banks, finance, a few law firms, are doing these returner programmes. I don't know anybody who's done one but they sound good. If nothing else it gets you some 'back in an office' experience. Employers are much more mindful now of how much talent they're missing out on and what they need to offer to attract mums back to the workplace. I offer a 3 month back to work programme (1 day workshop plus 3 months of live Q&As) but mine is much about getting your confidence back, focus, mindset plus all the practicals such as your CV, LinkedIn profile, interview skills etc.
Sherry