Months-long Guardian investigation exposes weaknesses in code of conduct that could trigger calls for greater reformCalls to toughen Lords rules as it is revealed one in 10 peers are paid for political adviceWhat is the House of Lords and what do peers do?A Guardian investigation into the House of Lords raises questions over the accountability of parliament’s second chamber, with revelations about how a string of peers are benefiting from commercial interests.One in 10 members have been hired to give political or policy advice, according to their own declarations, and others do paid work for companies that could conflict with their role as legislators. The findings expose weaknesses in the Lords code of conduct and raise questions about whether the rules on lobbying and paid employment should be tightened in line with restrictions signed up to by MPs.Nearly 100 members of the Lords are paid to give political or policy advice by commercial firms.A Labour peer offered access to minist...