The ones that can be easily consolidated are industry sector specific ( such as mines, diving, docks, quarries, remnants of Factories Act , Offices, Shops and Railway Premises Act, Explosives, Petroleum etc), that will not make much difference in the "requirements" that SME's have to meet! Yes, it will make a difference in the numbers that politicians can take credit for.
The Republic of Ireland's "Safety, Health and Welfare at Work (General Application) Regulations 2007" has our equivalent of Welfare, PUWER, PPE, Electricity at Work, Working at Height, Noise, Vibration at Work, Young persons, Nursing & expectant mothers, Night/shift working (the safety aspects of working time regs!), First Aid & DSEAR in a single set of regulation, but with different chapters and all the relevant schedules. The outcomes expected will be the SAME, no reduction in burden, except one will claim to have "reduced" 13 regulations into one.