From Preston Herald, Saturday 18 July 1903:
MORECAMBE Lightship Run Down.
  The new Morecambe Bay Trinity House lightship, valued
at about £20,000, was run into by the coasting steamer Abbot, of Newry,
Ireland, early in the morning [16 July 1903], and foundered in twelve fathoms of water
quarter-of-a-hour after the collision. It seems that she was from Liverpool
with a general cargo, and, through an untoward circumstance, she crashed into
the lightship, near the forepeak on the port side. It was seen that lightship
was doomed, and she began to fill rapidly. Indeed, but for the watertight
bulkheads, she would
have sank immediately. Captain Williams and crew of seven, who were on the
lightship, lowered their boat and got some their belongings together just
before the ship went down. The sea was perfectly calm at the time, and the men
got on to the coaster without difficulty. The Abbot, which was badly damaged
about the bow, then made for Fleetwood 20 miles distant, where they arrived
shortly before noon, the Abbot berthing alongside the quay near the railway
bridge. The Abbot is a new vessel belonging to Messrs. Fisher's, Newry, and Captain
McBride is her master.
Abridged report of court case from Belfast News-Letter, 24 September 1903
 A CAPTAIN FINED. At Belfast, yesterday, the Trinity House
authorities summoned Wm. McBride, master of the Newry steamship, Abbot, for
negligently running foul of and sinking the Morecambe Bay light vessel on the
16th of July. Evidence was given that as a result of a collision: the
lightship, which was valued at £12,000, became a total loss; that before
the collision the Abbot was repeatedly hailed without response; and that after
being struck, the lightship sank in 17 minutes, the crew having a very narrow
escape. The defence was that there had been no culpable negligence, and that
in any case the captain was not responsible. A fine of £20 was imposed.
  The Abbot was on a voyage Liverpool to Whitehaven, weather was calm
without fog and the collision occurred at 6am when there was daylight. The
crew of the Light vessel reported that no-one was to be seen at the helm of
the Abbot and that her course was not straight. After they had no response from
hailing her several times, they had not then enough time to fire a gun or operate
the fog signal. She struck the Light vessel near the port bow.
Discussion: The 1948 West of England Pilot gives the location of the
Morecambe Bay Light Vessel as 15.25m west of Rossall Point. At that date there
was also another "Light and Bell boat" 3.25m WNW of Rossall Point named
"LUNE". (The 1964 Pilot quotes the Morecambe Bay LV as 16.25 miles west of Rossall Point.)
  At a simlar date (to 1903), a lightvessel (called Morecambe
and not Morecambe Bay) also marked the Grange channel into Morecambe -
this was driven ashore in 1894, and again in 1903. It was discontinued after being driven from its
moorings
A wreck detected
at 53°54.415N, 3°30.914W and charted as "wreck 17.7m deep": this
location is 16.5nm at 267° from Rossall Point. This was surveyed in 1997
and is 38m long by 8m wide and rose 4.5m from the seabed, lying 178/358°.
There is evidence of cables extending 60m NW of the southern extremity of the
wreck. There is a significant magnetic anomaly. The size and location all tie
in with the remains of an iron light vessel.
  A portion of anchor cable is also charted nearby (0.1nm
away at 327°) as an obstruction.
Lightvessel no. 72 (same builder at similar date as LV no. 70) abandoned in the River Neath (note she has a taller light tower than originally fitted).
1901
Census list for Morecambe Bay Floating light. The court case
quotes, among these, witnesses Thomas Williams (master), John Thomas
(signal driver) and Hugh Owen (lamplighter). The census list has 7 crew
aboard and 4 crew on shore.
Morecambe was developed as a harbour when the railway reached it, allowing passengers to take ferries to the Isle of Man and to Ireland. There was a lightship, provided by the Railway Company, marking the channel in - close to where Heysham is now.
This lightship was driven from her moorings in 1898, when the damage was sufficiently serious that a new vessel to act as a lightship was procured.
This second lightship was, in turn, driven from her moorings in 1903. Since Heysham was now being developed as a port, with better tidal access, it was removed in 1904.
There was no loss of life in either case - full details below:
Note that, confusingly, there was a Morecambe Bay Light-vessel, which was stationed many miles offshore, to act as a reference point for vessels heading into the ports of Morecambe Bay. This vessel was sunk by collision in 1903 - details here