Observed on 9th of Jan 2021 in Newcastle Upon Tyne (UK) looking WSW at a little after Midnight.
If it was rather small, I suppose you were looking at the Pleiades, which is an open star cluster (not a constellation). Take a look at this web application: https://stellarium-web.org/ You can set a time and location and find constellations and other objects really easily.
In such situations, I find Astrometry.net particularly helpful. Feeding it your image, I got this result:
Of course, the stars Pleione, Sterope, and Taygeta are enough to identify the Pleiades.
While in this case it's fairly easy to identify the Pleiades by inspection alone and verify this, for less recognisable cases Astrometry.net is a very handy tool. They've got an online version, where you upload a photo and the recognition is done server-side, or you could install the app, either from repos or build from source.