Error message after updating Plug In's and Themes

I updated a few pages on our website tonight (www.stroodunitedfc.co.uk) and completed this with relative ease. I then noted some updates that needed performing. I completed the updates, went back and signed in, the whole layout of the home page had changed, with no short cuts on the left and the main page all in one column. I then went in and ran the updates, now I am presented with the following error when I try to go to the wesbite:
Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 30720 bytes) in /mounted-storage/home66c/sub003/sc39748-NVXS/stroodunitedfc.co.uk/wp-content/plugins/buddypress/bp-themes/bp-default/functions.php on line 421
I’m a bit of a novice with these things, can anyone help please!!!