By Guy Taylor Shares in Hornby, the British manufacturer of iconic model railway sets, tumbled over 15 per cent this morning after it flagged a dip in sales due to Red Sea ship attacks. The firm said group sales for the fourth quarter were eight per cent less than the same period last year, as high value container deliveries were pushed back into April. Sales for the full financial year were £56.2m, only a marginal two per cent ahead of the prior year figure. Conflict in the Red Sea began in November last year after Iran-backed Houthi rebels launched attacks in the Suez Canal, one of the world…