will you be applying to do a funded PhD in the UK or abroad?
And where did you do your undergrad?
I agree with H it's not known for Biological sciences, I actually did my undergraduate degree there, am now doing my masters at York university and I can say that if you can afford to go to Leeds you really should, as the facillities the department have to offer are very limited and also the research activity of the department is very low compared to other universities,very few publications in the last 3 years and very few of the academic staff are actively researching. In addition to this, the department is not well funded and so I think you would be very limited for future PhD study in the Uk.
The RAE score for the department is 3b (max is 5*) and it's ranked at 94 in the Times good university guide (out of 109).
Hope this helps.