The £ breakdown of the package components you could expect are detailed in our salary benchmarking report for the consulting industry, published at the end of this summer (so very current):
<a href=http://www.top-consultant.com/2007_salary_report.pdf target=_blank>PDF downloadable here</a>
In terms of components, basic + bens + bonus is the norm; car allowances are sometimes given, depends on the nature of the role. But they're far less commonplace than in other sectors.
All the best with the move to consulting