UK traffic sign: Vehicles exceeding a gross weight of 33T prohibited from crossing the bridge or structure (TSRGDNO 626.2AV6+627.1)Note - This sign is being phased out as described in para 7.15 of this document, published in 2011. A replacement file can be found at File:UK traffic sign 626.2A (variant 1b, 33t).svg.
UK Traffic signs image database
UK Government