Hello Ann
I have checked both banns and marriages 1780-1800 in Monewden, no trace. Unfortunately, the Brandeston marriages and banns 1754-1813 are missing.
However, here is what I do have:-
Brandeston baptisms
1770 Dec 17 Simon s/o Simon & Ann GLASCOCK
1813 Feb 7 William s/o Simon & Mary GLASSCOCK late SMITH
1828 Aug 10 Mary d/o Simon & Martha GLASSCOTT
Monewden baptisms
1768 May 22 Ann d/o Simon & Ann GLASSCOCK
1777 Nov 2 Mary d/o Simon & Ann GLASSCOCK
1783 Jun 15 Edmont s/o Simon & Ann GLASCOK
1798 Apr 26 daughter of Simon & Mary GLASCOT late SMITH
1800 Oct 19 Simon s/o Simon & Mary GLASCOCK late SMITH
1803 Apr 4 Chas s/o Simon & Mary GLASCOCK late SMITH
Monewden burials
1796 Nov 2 Edward GLASCOT
1800 Jul 23 Caziah GLASCOCK a child
1800 Nov 15 Simon GLASCOCK aged
1806 Nov 10 George GLASSCOCK infant
1807 Dec 30 Ann GLASSCOCK widow
1810 Jul 15 Mary GLASSCOCK infant
1811 Mar 31 Francis GLASSCOCK 6years
1811 Mar 31 Charles GLASSCOCK 8years
Hope this helps
Najma