White bread additives

Hi, I am a baker from Birch Island, Ontario. I have fits and starts in baking since I am not always here. I was just in Jolly Old and was fortunate enough to get face to face time in the local bakery. Should you be in Evesham the bakery on the main street makes excellent bread and , by going round the back(long walk) you can meet with the baker. Having had a long talk with him on the way back I thought I had not clarified the "Diamond" additive he said he added to his Bloomer Loaf. Can anyone help??