Sorry for the unsolicited lesson in the result of fees, but do you see the ~ 100 GBP difference over the past four years in the value of the fund to the FTSE index? (Red line vs green line at Dec 2016) That's the cost of 1.15% in fees every year.
In contrast, you have the Vanguard UK alternative which charges 0.08% ongoing with a 0.2% entrance fee. Same index as your fund, but you wont lose 25 GBP per 1000 per year of growth.
Food for all of our money trees.
My morningstar link is the Institutional class fund because the investor class fund I linked in Vanguard UK wasn't showing up on Mstar. I suspect the difference is even less fees if you have more than 10k.
Over 5 years, $100 becomes $144.7 or $151.4 with the same index but different fees.
Put another way $100,000 becomes $144,700 or $151,400 - that's $6,700 I'd rather have in my pocket.