LONDON (Reuters) – Britain may impose anti-dumping duties of up to 29% on aluminium extrusions from China to protect domestic producers, a trade agency said on Friday. Aluminium extrusions – widely used in the transport, construction and electronics industries – are being dumped in Britain at lower prices than they are sold in China, the Trade Remedies Authority said in a interim report. “The TRA determined that there is already damage to the UK industry, having found clear evidence of price undercutting, indicating that UK businesses are struggling to compete with the dumped imports,” a state…