If you have a question, then in the first instance speak to your supervisor, manager, HR manager or Ethics Lead. Or you can 'ask a question' online by going to serco-speakup.com. The system will forward your question to an appropriate manager who will respond.
If you have a concern then there are a number of paths you can follow.
Follow the path you want to take below. It will tell you who you can speak to, and give you alternatives if you're uncomfortable with any of your first options. It also tells you what will happen when you Speak Up.