Build upon 'successful' ASI fund
Fund returned 8.4% per annum
Agreement reached two months after 'unwinding' announced
Trust targets UK AIM and listed companies
Munro to 'take up a role outside of Aviva'
Execs sought further reassurances
Boosts AUM by £1.2bn
Market Briefings also back in spring programme
Joining from Westwood Holdings
Asset class 'performs well after crises'