Yes Durhamjen but the term 'within' in your post is within the Labour Party not Parliament in general
The term 'within' in his speech is the European Party Group Labour belongs to not the European Parliament in general.
It is the age old Big fish in a small pond or Small fish in a big pond.
There are 28 member states, 751 MEP's and Labour have 20 MEPs. I understand that the ' groupings' give a bigger picture but if and when anybody from any party, anybody from one of the 28 states states we must stay in 'A Reformed European Union' it is political spin and waffle they know , we know , it is like bashing your head against the proverbial wall to get agreement .
If anybody wants to disagree that point to defend Corbyn I will say you will probably be a poster that has derided, scorned, mocked Cameron and his negotiations over the so called UK's Deal. You will probably be a poster that has said he got nothing, he was belittled by the others, he was powerless. You will have made the point for me , the UK is a small fish in a big pond. Corbyn will be an even smaller fish in a big pond unless he becomes PM in 2020.
His speech was a missed opportunity to make the positives for staying in the EU because his speech was, as most of his speeches, most of his interviews, are ' talking to his core voter, the activists, the party faithful,' not the country or us as individual voters.