iPhone Locking to Network

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I have a new iPhone, bought at full price from John Lewis. I’m using it with a Vodafone contract sim, which has another few months left to run.

Will my phone now be locked to Vodafone and if so, will there be any hoops to jump through in order to get it unlocked?

Google was vague in its response.

 

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Ok thanks - I'll be passing an Apple shop in a couple of days and might ask then.

 

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Up until about 3 months ago full price from car phone warehouse locked to first sim put inside

I remember reading (several years ago) that all shop-bought iphones locked to the first network and I was feeling aggrieved at the thought that Vodafone might have some kind of say over which carrier I used. It sounds as if I have nothing to worry about.