common on the MGB so easily sourced

if your bonnets not secure this device is easily overcome by removal of device and original post terminal re-fitted

TRY

try

try

1/4 UNF

Try

tryhttps://www.ebay.co.uk/itm/382920961972

replaced the daughters( originally mine ) jointed under chassis rail but you will have to remove and cap pipes at ABS pump ( two different sizes but they are marked RL & RR on pump housing )and drain them as the flaring tool will not grip the pipes .had to replace both sides and flexi pipes...

may help

TRY

As you had the tank removed for the cross member replacement have you checked the fuel delivery pump filter in the tank you may have disturbed sediment in the tank and it's starving the pump

more info please but assume the landing light last on circuit,the bathroom light should have 3 neutral wire (fan, landing and nearest bedroom) and the bedrooms should each have two neutrals so would look at bedroom nearest to bathroom for loose neutral wire note do not count neutral wires...

It's a 22 year old vehicle so I would expect that various items will need replacing ,other named brands would have been crushed and sent back as Chinese steel

may help