Please do plan to keep to time to allow time for discussion. Most talks are scheduled to be 20' (+5' Q&A).
There are two ways to upload your slides, either:
(1) Create an IPPP indico account. If you don’t have one this can be done quickly at: https://conference.ippp.dur.ac.uk/register this will allow you to upload your slides, and to subsequently replace them slides if you wish, or
(2) email your slides to alan.barr@physics.ox.ac.uk the day before your talk.