:There is no automatic disqualification in statute that I can find. As section 3 of the House of Lords Act 1999 removes the disqualification on membership of the HOC for hereditary peers that have been kicked out, it can be assumed that a) such a disqualification exists for all other peers and b) that that disqualification is unwritten. Similarly, because special provision is made by section 8 of the House of Lords Precedence Act 1539 for the Great Officers of State who are not Lords to sit on the "Judges' Woolsack" (ie in the middle of the benches) in the House of Lords, it can be assumed that members of the HOC are otherwise disqualified from sitting in the lords. It's something of a grey area and just another part of our constitution that would not do badly from codification.