Please answer the given financial question based on the context.
Context: ||2019|2018|
||£m|£m|
|At beginning of the period|1,212.9|1,210.5|
|Additions|3.1|2.4|
|At end of the period|1,216.0|1,212.9|
3. Investments in subsidiaries
The additions in the year and prior year relate to equity-settled share-based payments granted to the employees of subsidiary companies.
Subsidiary undertakings are disclosed within note 35 to the consolidated financial statements.
Question: What do the additions in the year and prior year relate to?
Answer:
equity-settled share-based payments granted to the employees of subsidiary companies.