Historical spending by the UK Space Agency, Annual Reports and Size & Health of Industry Reports.
Given you all the information to show changes in spending trends as well as other relevant and useful links.
Industry 4.0 and the future of UK Space manufacturing. July 2019:
The Space Industry Act 2018:
http://www.legislation.gov.uk/ukpga/2018/5/contents/enacted
UK Space Industry: Size & Health of industry report 2018:
https://www.gov.uk/government/publications/uk-space-industry-size-and-health-report-2018
UK Spaceport Business Case Evaluation 2018:
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/747540/FS_WP_UK_Spaceport_Business_100418_CAM-v6-Digital.pdf
UK Space Agency Annual Report & Accounts 2016/2017:
https://www.gov.uk/government/publications/uk-space-agency-annual-report-and-accounts-2016-to-2017
UK Space Agency Corporate Plan 2016/2017 (direct link to download):
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/515049/16_17_UKSA_Corp_Plan_Final.pdf
UK Space Agency Size & Health of Industry report 2016:
https://www.gov.uk/government/publications/uk-space-industry-size-and-health-report-2016
UK Parliament – Exiting the European Union – Space Industry Report 2016:
https://www.parliament.uk/documents/commons-committees/Exiting-the-European-Union/17-19/Sectoral%20Analyses/34-Space-Report.pdf
UK Space Agency Annual Report & Accounts 2014/2015:
https://www.gov.uk/government/publications/uk-space-agency-annual-report-and-accounts-2014-to-2015
UK Space Agency – The Case for Space 2015:
http://www.ukspace.org/wp-content/uploads/2015/07/LE-Case-for-Space-2015-Full-Report.pdf
UK Space Agency Size & Health of the industry 2014:
https://www.gov.uk/government/publications/uk-space-industry-size-and-health-report-2014
UK Space Agency Annual Report & Accounts 2013/2014:
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/335126/Annual_Report_2013_to_2014.pdf
UK Space Agency Annual Report & Accounts 2012/2013:
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/246558/0460.pdf