Fundamental Defect definition
Fundamental Defect means a fundamental breach of Clauses 15.2.1 and/or 15.2.2 and/or 15.1.1(i) (to the extent a breach of Clause 15.1.1(i) would also constitute a breach of Clauses 15.2.1 and 15.2.2 had it occurred during the Warranty Period) in relation solely to the release(s) relating to the Billing System (currently planned to be Release 3) which causes a severe adverse effect on the British Gas Business;