In the case of UK Equity Income, the dividend paid out in 2019 was 18.6p
The closing share price on 28/10/2019 was 419p so dividend yield is 18.6 / 419 x 100 = 4.44%
The managemant charges fees of 0.33% annually but these would normally be included in the Trust's P & L as an expense
The annual report is available here [broken link removed]