iShares vs tracker fund in ISA

I'm thinking about next year's ISA. Basically I want a tracker, so initially thought about getting some tracker funds from the usual places like Fidelity or Legal & General.
I've found another option, which would be to buy iShares in a self-select ISA. It looks like the costs here are lower, and I'd have the option of converting to cash while the market falls, without having to withdraw money from the ISA and losing the tax benefits long term.
Any views?
Reply to

A perfectly sensible approach.
I try to avoid investing when something's fashionable so I use a moving average and invest when it drops a certain amount below. This is the approach I'll take with the iShares Dividend Plus fund I mentioned.
The only other thing is to check the rules for holding cash in an ISA as there used to be a limit.
Reply to

BeanSmart website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.