They introduce a themed burger every couple of months. Most recently they did the Ronaldo burger for the Euros and one now for the Summer called the Byron B&A. Basically Bacon AND Avocado. SUMMER IS or WAS HERE.
The B&A burger comes with slabs of bacon and avocado. The avocado is as a guacamole and this makes the burger a messy affair. The rest of the troops, which you may be able out make out above are roasted green bell peppers, Freddar cheese (their own trademarked cheesed), pickled red onions, Byron sauce (trademarked) and shredded iceberg lettuce.
Therefore you get a crunch form the veg, the growling bite of the cured bacon and the guacamole all over your face as you squash the burger down into your mouth. The B&A is a good edition to the Byron repertoire. Good food, worth the extra price for a seat down meal. Luckily for Londoners, a Byron is never too far away. Get this burger whilst it is still being served.
I'm looking forward to their latest invention.