Touch sensors and optical filters maker Zytronic reported an improved trading performance during the second half of its financial year and now expects full year results to be ahead of market expectations.Pre-tax profit for the year ended September 30th is now expected to be approximately £1.9m on revenues of £17.2m."Although the second half is generally stronger, this expected result represents a considerable increase over the £0.8m profit before taxation achieved in the first half, principally attributable to an improved proportion and mix of touch sensor sales resulting in better margins due to production efficiencies," Zytronic explained in a company statement. Its shares soared 11.04% to 181.00p at 09:45 in London.CJ