Zopa's basic rate for their instant saver is still 3.21%. There's also 3 levels of pot you can open with notice periods to get a little more (7 days: 3.25%, 31 days: 3.31%, 95 days: 3.47%). They've been slower to react to the interest rate increases but it has remained higher than most instant access.
Someone did point out you cannot add to a pot that has notice served on it, I.E. You've requested to take that money out and you're waiting. I'm not agressively saving and hoping to throw my pot at a house so not an issue for me but useful to know for those frequently moving about.