Google produced this on costmonkey
http://www.costsmonkey.co.uk/html/indemnity_costs.html
Conduct will commonly be a deciding factor in deciding whether the indemnity basis is the appropriate alternative to the standard basis and then only if the court considers a party's conduct has been wholly unreasonable. An example of such unreasonableness may be where a claiming party has been purposely dishonest and, more to the point, has intentionally misled the parties to the proceedings.