Bircham moved 40 points clear at the summit of Division One by winning a top-of-the-table clash at Terrington.
Shaun Fisher's 42 helped the league leaders set 177 for victory. And although Shehzad Ali scored 31, Terrington fell 57 runs short with James Foster (3-14) and Matt Rowe (3-19) performing superbly.
Sandringham moved into second thanks to a 51-run victory over Hillington. Their star men were Will Templeman (38) and Neil Irwin (5-20). Paul Hudson's 58 enabled Castle Rising to beat Castle Acre by three wickets while Denver beat Heacham by seven wickets.
In Division Two, leaders Northwold crushed Narborough A by seven wickets. Scott Adams took 7-37 as A slumped to 96-all-out. Tom Burkhill (100) was Holt's star man as they beat Downham B by 43 runs in a high-scoring fixture. Simon Groom's man of the match display (88 not out and 3-21) eased Hockwold to a 71-run triumph over Gooderstone.
Anish Thomas 5-18 shone as Hospital beat Sandringham A by six wickets while elsewhere Swaffham A saw off eight-man Gayton by two wickets.
Thornham maintained their 100pc record in Division Three by breezing to a 147-run victory over Beeston A. James Rix scored 62. Castle Rising A's openers Chunky Wilson (62) and T Dyer (120no) put on 163 as their side declared on 243-1. Gooderstone A got nowhere near their total as Andy Chinniah took 5-22 as Rising bowled their opponents for 87.
Damien Twiddy registered an unbeaten 45 as Snettisham beat Dersingham by nine wickets while Fakenham B enjoyed a same-margin triumph against Denver with N Thurston taking 4-5 as well as H Thornton (48) and Keith Woodhouse (33no) chipping in with the bat.
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