Map with heatmap and boundaries

I require the creation of an interactive digital map to depict property value trends in Manchester, England. The map must utilize open-source technology and display the 2011 ward boundaries for Manchester City Council, sourced from the provided Ordnance Survey data:

https://www.data.gov.uk/dataset/fcd82afe-d8fd-417a-ac0a-b3acd7d8a422/census-merged-wards-december-2011-boundaries-ew-bfe

Comparable property sale values from the attached spreadsheet, geocoded by postcode, need to be transliterated onto the map as a dynamic heatmap.

The heatmap coloring should correspond proportionally to the £/m2 figures in the final column of the excel file.

The completed map file should be hosted on a software platform that allows external viewing and utilization of the full interactive functionality.

In addition, a sample screenshot of the visualized heatmap would benefit evaluation of the final product.

The project has a short 24 hour deadline and preference is given to deliverables employing open-source solutions.