Video available on YouTube at: https://www.youtube.com/watch?v=62sqeLqzyMs
Discussion points in Q&A:
Freezing seeds: some seeds need to go through a period of freezing/cold to aid in germination (known as stratification). Several meadow species require this, which is why it is recommended to sow them in Autumn.
Certain species dominating area: pull them out! Certain species are more vigorous than others so if you notice one species dominating and you'd rather change that, remove some plants before they set seed.
When exactly to do 'Spring cut': no definitive 'date' per se. Before the end of March was given as a benchmark, but was caveated by the point that weather conditions can be variable even at the best of times. The general principle for the Spring cut is to do a cut before things on the site have started growing, provided you can get on to the site without damaging the soil (in early Spring, the soil may be waterlogged and thus prone to damage if mowed).
Ragwort: foodplant for the Cinnabar moth! But also, a reminder that this plant is toxic to horses, as well as being harmful to humans. Skin contact with ragwort can cause photosensitivity, so always handle ragwort with gloves when removing. Tool to help remove ragwort is a 'rag-fork', example of which found here: https://www.britishhorseshop.com/products/ragwort-fork