Capital Gains Tax Calculations

I am a private investor seeking an experienced person to bookkeep and calculate my CGT for the current tax year 2011/12 . All quoted shares, purchases and sales, majority are purchases. Approx 250 transactions in current year. UK, Australia and Canadian stock exchanges. 2 internet broking sites used for transactions. I live near Newbury in Berkshire and a person within reasonable travelling distance an advantage. Confidentiality expected. Recurring work envisaged.