@Can'tTell, regarding your question about "tickers" in DStanley's answer, by ticker, she means ticker symbol. A ticker symbol identifies a security on an exchange. An ISIN identifies a security, but the ticker symbol identifies it on a particular exchange, and that ticker symbol can suffer from exchange to exchange.
In your screenshot, under each of the two entries, there is a pipe-delimited line with four fields:
- exchange (SWX or LSE)
- ticker symbol
- currency (EUR)
Note that the two entries share the same ISIN so they are really the same security. The two entries differ in what exchange they are traded on, and on each exchange, they have a different ticker symbol.
This article talks a little about the difference between ISIN and ticker symbols.
(Sorry, but I've left this as an answer because I just joined and don't have enough points to leave it as a comment under your original comment asking about tickers.)