AJ Bell has added 70 Exchange Traded Funds and investment trusts to its Sippcentre Regular Investment Service.
The Regular Investment Service offers users more than 6,500 funds as well as FTSE 350 shares, ETFs and investment trusts.
None of these investments have any dealing charges which keeps costs low.
The service is available via AJ Bell's funds and shares service which offer more than 7,700 funds including 2,700 clean share classes.
As well as the Sippcentre Sipp, funds are also accessible via the firm's Isa and GIA.
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Billy Mackay, marketing director at AJ Bell, said the additions were due to increased adviser demand.
He said: "One of the benefits of having a background in stockbroking is we are able to fully embrace the increasing popularity of clean share classes, ETFs and investment trusts.
"The latest addition of yet more ETFs and investment trusts is a reflection of the increased demand we are seeing from advisers for these vehicles.
"As demand has increased for ETFs and investment trusts, we have continued to enhance our range. The latest additions take the number of ETFs and investment trust for regular investments to almost 200."
Sippcentre is the platform of AJ Bell, one of the largest providers of online investment platforms and stockbroker services.