As per PR # 83 comments, Changes are implemented.

Author: vidhya-chandra1

docs/utility-guides/NHSNumberTools.md

@@ -21,13 +21,16 @@ common functionality that may apply to many services in relation to NHS Number m
 
 You can initialise the NHS Number Tools class by using the following code in your test file:
 
-    from utils.nhs_number_tools import NHSNumberTools
-
+```python
+from utils.nhs_number_tools import NHSNumberTools
+```
 ## `_nhs_number_checks()`: Checks if the NHS number is valid
 
 The `_nhs_number_checks()` method does basic checks on NHS number value provided and raises an exception if the number is not valid:
 
+```python
     NHSNumberTools._nhs_number_checks(incorrect_nhs_no)
+```
 
 ### Required Arguments
 
@@ -54,7 +57,9 @@ from utils.nhs_number_tools import NHSNumberTools
 The `spaced_nhs_number()` method is designed to take the provided NHS number and return it in a formatted
 string of the format `nnn nnn nnnn`.  It's a static method so can be used in the following way:
 
+```python
     spaced_nhs_number = NHSNumberTools.spaced_nhs_number("1234567890")
+```
 
 ### Required Arguments