WHY was there NO Thomas Andrews, the master shipbuilder?

I'd avoided this TV film for years because of the lukewarm reviews and my aversion to Catherine Zeta Jones, but it was on Channel 5 in the UK today so I thought 'what the heck'.

Anyway. Despite the appalling and inaccurate accents given to First Officer Murdoch and Fifth Officer Lowe (who were Scottish and Welsh respectively, yet were given terrible English accents for this film!), there was one GAPING hole: Thomas Andrews, the master shipbuilder and a HUGE part of Titanic's story and history.

The Northern Irish Harland & Wolff shipbuilder was completely obliterated from this version of events; he didn't even exist. All credit for building the Titanic was given to the English bloke from Cheers who played Ismay, and Ismay was the one strutting around the ship like a peacock, giving orders to light the last boilders and inspecting the damage once the iceberg hit (historically wrong, it was Andrews who inspected for damage). Poor sweet Mr. Andrews was erased from existence and I found that very insulting. The story of Titanic, in whatever form, is not a complete one without even a single mention of Thomas Andrews. You can't have a Titanic-based movie set onboard the ship, featuring the officers, the captain, the Marconi operators and everyone else, but NO Thomas Andrews. Ridiculous and inaccurate.