Has the UK store always shown 10 days from the minute it went up for pre-order? I've seen things in the past where it stays at that initial estimate and once the release date gets closer it becomes more accurate, effectively saying if you order now you'll get it on release day,.
Not sure whether to order online just now or try my luck in store later this week.
Nope the UK store was showing 31/3 for all the iPhone SE's at the start, it's only recently this has changed on some colour options.
John Lewis are taking pre-orders for the iPhone SE starting 29/3 at 8pm for collection in store on the 31st.
Not sure how much stock they will have, but this might be better than chancing your luck on the day at an Apple Store