Geographical Information Science Research UK (GISRUK) is a research conference that has been taking place in different university campuses around the UK (and once in Ireland) since 1993. Despite the name, it is open not just to researchers from the UK, but also to international participants, who are very welcome.
For me, GISRUK was the first international conference in which I presented a paper eleven years ago, so I have a soft spot for it. It was very friendly and welcoming for a starting research student (which I was at the time). It was especially useful to discover that all the famous academics who attended it were friendly and open to questions.
The papers are rather short, about 1500 words, so there is plenty of time to write one in time for the deadline of the end of November.