Operated by Blue Triangle, which is owned by London's largest transport provider, the Go-Ahead Group the number 15 bus serves Blackwall to Charring Cross via multiple stations (Bank, Monument, City Thameslink). It also serves touristy spots like Trafalgar Square, St Paul's Cathedral and the Tower of London, making it one of the better bus routes near the Doubletree by Hilton London - Tower of London, where I was spending the night while in London.
The buses did seem to be a little confusing as they don't always appear to run the full route, with no explanation, I originally was confused, being a tourist, I didn't know which bus was correct with the destination the bus was supposed to be going, not stated on the front. The drivers seemed to follow typical London customer service, they didn't seem too helpful, friendly nor willing to help either.
The buses were again typical of London, a little old-fashioned seating yet clean.
They serve many stations even more than the ones I've mentioned and a few touristy areas, but improvements could be made on the quality of buses and service as well as running the whole route without delays.
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