there are flared, straight sided bowls in Geoff. Timberlake's book, but none that I can see with a profile as low and wide as this one looks to be, and coupled with the apparent complete lack of a pontil scar or depression, makes me suggest this isn't Nazeing.
Before seeing the comments about an absence of pontil, I might have suggested S. & W. - based on the colour plus what appear to be rather heavy halos around the bubbles, but now really not sure. These bubbled pieces can be the devil to id.
See this much earlier thread, which seems to have caused some difference of opinion.........
http://www.glassmessages.com/index.php/topic,33957.msg183696.html#msg183696Nigel B. might be the guy to know, but he so rarely looks in these days.
Would be useful to know the height and diameter, plus a shot of the base, please.