Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Operator | Number purchased | Variant | Bodybuilder | Year(s) purchased |
| --- | --- | --- | --- | --- |
| SHMD * | 1.0 | G6HS | Northern Counties | 1952 |
| Glasgow | 1.0 | D650HS | Alexander | 1953 |
| Cleethorpes | 2.0 | G6HS | Roe | 1953, 1955 |
| Swindon | 4.0 | D650HS | Park Royal | 1954 |
| Coventry | 3.0 | G6HS | Willowbrook | 1959 |
Question:
Who is the operator when willowbrook was the bodybuilder?
Answer:
Coventry