ISA Discount Broker: Bestinvest vs Hargreaves Lansdown

I want to invest £3000 in 6 funds (£500 each) in an ISA. Can anyone please advise which is the best discount broker between Bestinvest and Hargreaves Lansdown?
What is the minimum lump sum per fund for each broker? What are the commission discounts and trail commissions for each?
Many thanks!
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