It might be better to explain exactly what you did in the role and what transferrable skills you gained as a result.
By saying “engaged in” and “assisted in”, it is probably not going to show what contribution you made, or what your duties actually were, in an effective and accurate way. 🙂
I also think it’s better to stick to the word count for the personal statement. Given it is 20 words over, making minor changes to the phrasing of sentences might be a good idea. 🙂
Best of luck with your
Freshfields application!!