LONDON (Reuters) – Fund managers in Britain posted a 6% rise in assets under management to 10 trillion pounds ($10.8 trillion) last year, but a slowdown is likely, the Investment Association (IA) said on Tuesday. The 2021 growth rate was below the 11% compound average annual increase seen in the last 10 years, according to an IA survey. “Whilst 2021 was a positive year, we now face a very different operating environment,” IA CEO Chris Cummings said in the report, pointing to the war in Ukraine. “Rising interest rates bring the spectre of recession and weaken the outlook for asset growth.” Ster…