Cider jar, I was at the site today. It took me 12 minutes to get to it from the Mem. Yes, I actually clocked it. And that included a hold up of a couple of minutes when two buses got jammed up in Filton Avenue.
Of course I was driving, don't know how long it would be to walk, but not more than 30-40 mins I would suggest. But luckily, there s plenty of public transport that goes between the two. There is buses every few minutes, so no problem there.