While Jason Demetriou is identified as a Cypriot footballer (Wikipedia) and is linked to a goal in Israel (web search), the evidence does not contain multiple independent sources confirming that *his* goal specifically secured Wales' qualification for their first major tournament in 58 years. The connection is strongly implied by other claims but not independently verified by multiple sources.

The evidence provided for this claim consists only of general Wikipedia links about London and Cyprus, and does not contain any specific reports or articles confirming that a London-born Cypriot scored the 'most important goal in Welsh football history' in Israel. The claim cannot be corroborated by the provided evidence.

The evidence confirms that Israel's results were crucial in the Euro 2016 qualifiers (web_search: Wales v Israel: Euro 2016 qualifier - as it happened: Wales were frustrated by Israel as they failed to find the win that would have secured their Euro 2016 place...). However, no source explicitly details that 'Israel dropping points in their final two games' was the determining factor for Wales' qualification; this specific sequence of events is not corroborated by multiple sources.

The evidence confirms that Wales and Bosnia-Herzegovina played in the 2015 qualifiers (web_search: Wales vs. Bosnia-Herzegovina: Head-to-head record...). One web search result mentions the match contextually, but none of the provided sources explicitly state that Wales 'were 2-0 down' in that specific match.

The evidence confirms that Wales and Bosnia-Herzegovina played in the Euro 2016 qualifiers (Wikipedia: UEFA Euro 2016 qualifying Group B; web_search: Wales vs. Bosnia-Herzegovina: Head-to-head record...). However, none of the provided sources explicitly state that Wales 'required a draw' in their 2015 qualifier against Bosnia-Herzegovina to qualify. The context suggests importance, but the specific condition (needing a draw) is not confirmed by multiple sources.