UK traffic sign: Vehicles exceeding a gross weight of 7.5T prohibited from crossing the bridge or structure (TSRGDNO 626.2AV2)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 1a, 7.5t).svg.
UK Traffic signs image database
UK Government