Space for a shrub any suggestions

We planted a Ragged Robin, green and red leaves, several years ago to fill a gap between our garden and neighbours. It's worked perfectly. Leaves all year round, now about 4 feet high but easy to trim and a good shape. It's grown nicely to fit the gap.

Spirea maybe. I have a lovely bridal white one.

I have a purple hebe which is continuously in flower even in the very cold weather but it does need a lot of cutting back.

Bijou don't tell me you still do gardening!
I've just about given up.

Is your soil acid or alkaline? Some plants such as Pieris prefer an acid soil and you may have difficulty growing them. If your soil is acidic a camellia is a lovely evergreen with beautiful flowers late winter/ early spring - flowers come in white, red, pink or Apricot and can be double or singles.

Viburnum bodnantense...flowers all winter from October'ish and smells of honey. Has pretty bronze tinged leaves in Summer.

A hardy fuschia? Not evergreen though. Pittosporum Tom Thumb?

Sorry, did not notice that you already have hydrangeas, but don't forget they come in many different shapes and sizes and colours,

Another vote for Flame Bush - pieris.
I have two in the garden and the are looking quite pretty in my spring garden.
I would estimate that they are both about 3 ft tall.

Daphné grows wild here in the Jura- all in flower in the mountains on bare wood at the moment- gorgeous smell Anno. Bought a mock orange today- miss the huge one we had in UK, and hope it will do ok in our harsh climate.

A Philadelphus (mock orange) has white flowers in the spring and, I think, is evergreen.

We have a shrub which is flowering spectacularly at the moment; however it is not evergreen and unfortunately has lost its label! If I can find the label or google it, I will post again. It is really lovely, with tiny white flowers.

It could be a spirea

You hit the nail on the head, Jura when you said “the huge one we had in UK”. We planted one and despite judicious pruning it romped away and became too big for its site. Ditto the two “dwarf” lilacs. However, in both cases, the scent was heavenly.

The evergreen Viburnum ‘Spirit’ would be perfect.
Reaches four or five feet but can be easily trimmed.
Pinky white blossom several times a year with a pleasant scent.