Drinks giant Diageo tops good governance rankings

The Institute of Directors' (IoD) Good Governance survey ranked companies according to 47 indicators in five broad categories including board effectiveness, audit and risk/external accountability, remuneration, as well as shareholder and stakeholder relations.

Here are the best and worst ranked companies on the index:

Top 10 companies

1 Diageo
2 Aviva
3 GKN
4 Barclays
5 Smiths Group
6= Prudential (tied)
6= RSA Insurance Group (tied)
8 International Consolidated Airlines Group
9= InterContinental Hotels Group (tied)
9= Compass Group (tied)

Bottom 10 companies

94 Rolls-Royce Holdings
95 Whitbread
96 Burberry
97 BAE Systems
98 Standard Chartered
99 ASOS
100 Anglo American
101 G4S
102 Carnival
103 GlaxoSmithKline