Table:
|  | 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 |
Paragraphs:
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 are the components factored in the calculation of investments in subsidiaries at end of the period?
Answer: At beginning of the period, Additions