SENIOR Hong Kong figures, including Lords Wilson and MacLehose, will speak on the impasse with China tonight in a House of Lords debate expected to be critical of the way the democracy-reform package was handled. Former Foreign Office Hong Kong Minister Lord Glenarthur called the debate at the behest of other Tory peers. He said it was a pity negotiations on the Patten proposals could not have avoided recriminations from Beijing. He would argue that Britain had its own interests to serve, as well as those of Hong Kong, though there was ''absolutely no sign'' that Chinese threats to British trade were materialising. Among the 19 due to speak, Lord MacLehose is one who has questioned the way the democracy package was handled. Lord Bonham-Carter is expected to call again for British passports for ethnic minorities and Lady Dunn will give the view from Hong Kong. Baroness Chalker, the Foreign Office Minister, will reply for the Government.