lonelyplanetmum
This is a pretty comprehensive list of updated losses
I've seen this list posted a few times before - I've found the original. It's drawn up by someone called Mr Hickmott - he has an anti-Brexit twitter account as well.
His job loss index links from here;
smallbusinessprices.co.uk/brexit-index/
The Brexit Job Loss Index is an attempt to keep track of the number of jobs lost in the UK due to Brexit.
Here is his methodology
Job losses are attributed to Brexit if they meet one or more of the following conditions:
1.The employer’s business has been significantly affected by sterling’s devaluation, either immediately through rises in the cost of imported inputs or later by inflation passed on by those who were so affected.
2.Government austerity cuts are attributed to Brexit since Britain voted to remain the EU, austerity would have been lifted instead of deepened.
3.Barring other obvious explanations businesses that were doing okay but experienced a significant slowdown after the Brexit vote are deemed to have been impacted by Brexit.
4.Businesses and other enterprises (e.g. EU regulatory authorities) that will be impacted by the imposition of trading or regulatory barriers (including the potential imposition of tariffs).
5.All jobs moved abroad are considered Brexit-related even if offshored outside the EU, since Brexit makes Britain a “third country” to the EU, just like India or China.
Other factors are occasionally cited but these are the main categories.
Job losses due to changes in the way business is conducted, such as those due to banking automation or to internet shopping, are usually excluded unless there is some compelling reason to regard Brexit is the real reason for cutting staff. 
Mr Hickmott claims to have updated his list on the 11th March 2019 - but I can see straightaway that he hasn't revised the job losses for House of Fraser and Deutsche Bank (obviously Deutsche Bank is in the news today regarding a possible merger):
House of Fraser - should be 6,000 job losses, not 12,500 after the rescue bid - all job losses are Brexit related of course - nothing to do with the boom in online shopping affecting the high street or business rates.
Deutsche Bank - Mr Hickmott says 4,000 job losses due to Brexit, but the CEO of Deutsche Bank said this;
Deutsche will move hundreds, rather than thousands, of jobs from the U.K. to the Continent because of Brexit, CEO John Cryan said.
“The number of 4,000 mentioned again and again in media reports is way too high,” Cryan told Switzerland's Neue Zürcher Zeitung newspaper in an interview published Saturday.
www.politico.eu/article/deutsche-bank-says-it-will-shift-only-hundreds-of-jobs-due-to-brexit
He's got several entries for Jaguar Land Rover - where did he get 24,800 job losses from? He's put unknown??
I know a bit about Bet365 as well.
Mr Hickmott says 1,000 job losses in Gibraltar - Bet365 denies it;
www.casinonewsdaily.com/2018/05/21/bet365-denies-malta-relocation-reports-confirms-expansion-in-the-gambling-hub/
He doesn't seem to be a very reliable source of information.